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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * FooGallery Admin Notices class  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                if ( ! class_exists( 'FooGallery_Admin_Notices' ) ) { | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    class FooGallery_Admin_Notices { | 
            
                            
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                        public function __construct() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            add_action( 'admin_notices', array( $this, 'display_thumb_test_notice') );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            add_action( 'foogallery_thumbnail_generation_test', array( $this, 'save_test_results') );  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        function should_run_tests() { | 
            
                            
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                            $option = get_option( FOOGALLERY_OPTION_THUMB_TEST );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $option_value = $this->generate_option_value();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ( !isset( $option ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                //we have never run tests before  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $option_key = $option['key'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                if ( $option_value !== $option_key ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    //either the PHP version or Host has changed. In either case, we should run tests again!  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return false;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        function should_show_alert() { | 
            
                            
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                            $option = get_option( FOOGALLERY_OPTION_THUMB_TEST );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ( isset( $option ) && array_key_exists( 'results', $option ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $results = $option['results'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                //should show the alert if the tests were not a success  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return !$results['success'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return false;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        function generate_option_value() { | 
            
                            
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                            $php_version = phpversion();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $host = home_url();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return "php$($php_version}-{$host}"; | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        function save_test_results($results) { | 
            
                            
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                            update_option( FOOGALLERY_OPTION_THUMB_TEST, array (  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'key' => $this->generate_option_value(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'results' => $results  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ));  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        function display_thumb_test_notice() { | 
            
                            
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                            //check if we are on specific admin pages  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ( FOOGALLERY_CPT_GALLERY === foo_current_screen_post_type() ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                if ($this->should_run_tests()) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $thumbs = new FooGallery_Thumbnails();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $thumbs->run_thumbnail_generation_tests();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                if ($this->should_show_alert()) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    ?>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    <div class="notice error">  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                        <p>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                            <strong><?php _e('Thumbnail Generation Alert!', 'foogallery'); ?></strong><br/> | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                            <?php _e('There is a problem generating thumbnails for your gallery. Please check that your hosting provider has the GD Image Library extension installed and enabled.' , 'foogallery'); ?><br /> | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                            <?php _e('If thumbnails cannot be generated, then full-sized, uncropped images will be used instead. This will result in slow page load times, and thumbnails that do not look correct.', 'foogallery'); ?> | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                            <br/>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                        </p>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    </div>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                        
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.