| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  | if ( ! defined( 'ABSPATH' ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | 	exit; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  | } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * Cart Item. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * @version		2.7.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  * @package		WooCommerce/Classes | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  * @category	Class | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  |  * @author 		WooThemes | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | class WC_Cart_Item implements ArrayAccess { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | 	 * Cart Data array. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  | 	 * @since 2.7.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  | 	 * @var array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  | 	protected $data = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  | 		'product_id' => 0, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  | 		'quantity'   => 0, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  | 		'variation'  => array(), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  | 	); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | 	 * Product this item represents. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  | 	 * @var WC_Product | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  | 	protected $product = null; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  | 	 * Constructor. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  | 	 * @param array $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  | 	public function __construct( $data = array() ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  | 		$this->set_data( $data ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  | 	 * offsetGet for ArrayAccess/Backwards compatibility. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  | 	 * @deprecated Add deprecation notices in future release. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  | 	 * @param string $offset | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  | 	 * @return mixed | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  | 	public function offsetGet( $offset ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  | 		switch ( $offset ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  | 			case 'data' : | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  | 				return $this->get_product(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  | 			case 'variation_id' : | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  | 				return is_callable( array( $this, 'get_variation_id' ) ) ? $this->get_product()->get_variation_id() : 0; | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  | 		return isset( $this->data[ $offset ] ) ? $this->data[ $offset ] : ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  | 	 * offsetSet for ArrayAccess/Backwards compatibility. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  | 	 * @deprecated Add deprecation notices in future release. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  | 	 * @param string $offset | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  | 	 * @param mixed $value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  | 	public function offsetSet( $offset, $value ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  | 		switch ( $offset ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  | 			case 'data' : | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  | 				$this->set_product( $value ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  | 				break; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  | 			case 'variation_id' : | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  | 				$this->set_product( wc_get_product( $value ) ); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  | 				break; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  | 			default : | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  | 				$this->data[ $offset ] = $value; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  | 				break; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  | 	 * offsetExists for ArrayAccess | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  | 	 * @param string $offset | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  | 	 * @return bool | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  | 	public function offsetExists( $offset ) { | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 83 |  | View Code Duplication | 		if ( in_array( $offset, array( 'data' ) ) || isset( $this->data[ $offset ] ) ) { | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  | 			return true; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  | 		return false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  | 	 * offsetUnset for ArrayAccess | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  | 	 * @param string $offset | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  | 	public function offsetUnset( $offset ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  | 		unset( $this->data[ $offset ] ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  | 	 * Gets price of the product. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  | 	 * @return float | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  | 	public function get_price() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  | 		return $this->get_product() ? $this->get_product()->get_price() : 0; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  | 	 * Gets price of the product. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  | 	 * @return float | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  | 	public function get_weight() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  | 		return $this->get_product() ? $this->get_product()->get_weight() : 0; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  | 	 * Gets price of the product. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  | 	 * @return float | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  | 	public function get_tax_class() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  | 		return $this->get_product() ? $this->get_product()->get_tax_class() : ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  | 	 * Set product. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  | 	 * @param int $value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  | 	public function set_product( $value ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  | 		$this->product = $value; | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  | 		$this->data['product_id'] = is_callable( array( $this->product, 'get_variation_id' ) ) ? $this->product->get_variation_id() : $this->product->get_id(); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                            
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  | 	 * Get product object. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  | 	 * @return WC_Product | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  | 	public function get_product() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  | 		return ! is_null( $this->product ) ? $this->product : ( $this->product = wc_get_product( $this->get_product_id() ) ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  | 	 * Get all item data. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  | 	 * @return array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  | 	public function get_data() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  | 		return $this->data; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  | 	 * Product or variation ID this item represents. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  | 	 * @return int | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  | 	public function get_product_id() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  | 		return $this->data['product_id']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  | 	 * Get quantity in cart. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  | 	 * @return int | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 157 |  |  | 	 */ | 
            
                                                                        
                            
            
                                    
            
            
                | 158 |  |  | 	public function get_quantity() { | 
            
                                                                        
                            
            
                                    
            
            
                | 159 |  |  | 		return $this->data['quantity']; | 
            
                                                                        
                            
            
                                    
            
            
                | 160 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  | 	 * Get variation data. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  | 	 * @return array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  | 	public function get_variation() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  | 		return $this->data['variation']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  | 	 * Set product ID. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  | 	 * @param int $value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  | 	public function set_product_id( $value ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  | 		$this->data['product_id'] = absint( $value ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 |  |  | 		$this->product = null; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  | 	 * Set Quantity. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  | 	 * @param int $value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  | 	public function set_quantity( $value ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  | 		$this->data['quantity'] = wc_stock_amount( $value ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  | 	 * Set variation data. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  | 	 * @param array $value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  | 	public function set_variation( $value ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  | 		$this->data['variation'] = (array) $value; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  | 	 * Set all data. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  | 	 * @param array $value | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  | 	public function set_data( $values ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  | 		if ( is_a( $values, 'WC_Cart_Item' ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  | 			$values = $values->get_data(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  | 		foreach ( $values as $key => $value ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  | 			if ( in_array( $key, array( 'quantity', 'product_id', 'variation', 'product' ) ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  | 				$this->{ "set_$key" }( $value ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  | 			} else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  | 				$this->data[ $key ] = $value; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  | 			} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  | 	} | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 211 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 212 |  |  |  | 
            
                        
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different sub-classes of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the parent class: