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<?php |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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/** |
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* Cart Fees API. |
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* |
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* Fees are additional costs added to orders. Implemtns Iterator for backwards compatibility. |
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* |
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* @class WC_Cart_Fees |
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* @version 2.7.0 |
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* @package WooCommerce/Classes |
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* @category Class |
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* @author WooThemes |
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*/ |
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class WC_Cart_Fees implements Iterator { |
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/** |
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* An array of fee objects. |
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* @var object[] |
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*/ |
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private $fees = array(); |
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/** |
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* Iterator Position. |
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* @var integer |
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*/ |
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private $position = 0; |
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/** |
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* Constructor. |
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*/ |
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public function __construct() { |
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$this->position = 0; |
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} |
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/** |
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* Rewind Iterator. |
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*/ |
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public function rewind() { |
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$this->position = 0; |
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} |
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/** |
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* Current Iterator. |
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*/ |
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public function current() { |
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return $this->fees[ $this->position ]; |
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} |
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/** |
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* Key Iterator. |
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*/ |
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public function key() { |
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return $this->position; |
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} |
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/** |
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* Next Iterator. |
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*/ |
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public function next() { |
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++$this->position; |
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} |
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/** |
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* Valid Iterator. |
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*/ |
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public function valid() { |
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return isset( $this->fees[ $this->position ] ); |
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} |
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/** |
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* Allow 3rd parties to calculate and register fees. |
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*/ |
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public function calculate_fees() { |
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// Remove any existing fees. |
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$this->set_fees( false ); |
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// Fire an action where developers can add their fees |
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do_action( 'woocommerce_cart_calculate_fees', WC()->cart ); |
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// Return fees |
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return $this->get_fees(); |
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} |
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/** |
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* Generate a unique ID for the fee being added. |
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* |
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* @param string $fee Fee name. |
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* @return string fee key. |
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*/ |
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public function generate_key( $fee ) { |
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return sanitize_title( $fee ); |
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} |
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/** |
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* Get fees. |
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* @return array |
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*/ |
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public function get_fees() { |
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return $this->fees; |
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} |
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/** |
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* Set fees. |
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* @param object[] $value Array of fees. |
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*/ |
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public function set_fees( $value ) { |
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$this->fees = array_filter( (array) $value ); |
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} |
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} |
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It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: