| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  |  * @package   WordPress Dynamic CSS | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  * @version   1.0.5 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * @author    Askupa Software <[email protected]> | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * @link      https://github.com/askupasoftware/wp-dynamic-css | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * @copyright 2016 Askupa Software | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  * Dynamic CSS Cache Handler | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | class DynamicCSSCache | 
                            
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                | 14 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |      * @var DynamicCSSCache The reference to *Singleton* instance of this class | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |     private static $instance; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |      * @var array The reference to the cached compiled CSS that is stored in the database  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |     private static $cache; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |      * Returns the *Singleton* instance of this class. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |      * @return DynamicCSSCache The *Singleton* instance. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |     public static function get_instance() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |         if (null === static::$instance)  | 
                            
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                | 33 |  |  |         { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |             static::$instance = new static(); | 
                            
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                | 35 |  |  |             self::load_cache(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |         return static::$instance; | 
                            
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                | 38 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |      * Returns the compiled CSS for the given handle if it exists in the cache. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |      * Returns false otherwise. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |      * @param string $handle The handle of the stylesheet | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |      * @return boolean|string | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 46 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 47 |  |  |     public function get( $handle ) | 
            
                                                                        
                            
            
                                    
            
            
                | 48 |  |  |     { | 
            
                                                                        
                            
            
                                    
            
            
                | 49 |  |  |         if( array_key_exists( $handle, self::$cache ) ) | 
            
                                                                        
                            
            
                                    
            
            
                | 50 |  |  |         { | 
            
                                                                        
                            
            
                                    
            
            
                | 51 |  |  |             return self::$cache[$handle]; | 
            
                                                                        
                            
            
                                    
            
            
                | 52 |  |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 53 |  |  |         return false; | 
            
                                                                        
                            
            
                                    
            
            
                | 54 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |      * Update the compiled CSS for the given handle. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |      * @param string $handle The handle of the stylesheet | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |      * @param string $compiled_css | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |     public function update( $handle, $compiled_css ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |         self::$cache[$handle] = $compiled_css; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |         $this->update_option(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |      * Clear the compiled CSS from cache for the given handle. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  |      * @param string $handle The handle of the stylesheet | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |     public function clear( $handle ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |         unset(self::$cache[$handle]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |         $this->update_option(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |      * Load the cache value from the database or create an empty array if the | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |      * cache is empty. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |     private static function load_cache() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |         self::$cache = get_option('wp-dynamic-css-cache'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |         if( false === self::$cache ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |         { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |             self::$cache = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |      * Update the database option with the local cache value. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |     private function update_option() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |         update_option('wp-dynamic-css-cache', self::$cache); | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 99 |  |  |     } | 
            
                                                        
            
                                    
            
            
                | 100 |  |  | } | 
            
                        
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.