$details) { if($details['value']) { //display meta box if at least one value is set add_meta_box('perfmatters', 'Perfmatters', array('Perfmatters\Meta', 'load_meta_box'), get_post_types(array('public' => true)), 'side', 'high'); break; } } } //display meta box public static function load_meta_box() { global $post; //noncename needed to verify where the data originated echo ''; //print inputs foreach(self::$meta_options as $id => $details) { //existing meta value $meta = get_post_meta($post->ID, 'perfmatters_exclude_' . $id, true); //individual input echo ''; echo ''; echo ''; echo ''; echo $details['name']; echo ''; echo ''; } //clear used css if(!empty(Config::$options['assets']['remove_unused_css'])) { echo ''; echo '

'; echo '' . __('Clear Used CSS', 'perfmatters') . ''; echo ''; echo ''; echo wp_nonce_field('perfmatters_clear_post_used_css', 'perfmatters_clear_post_used_css', false, false); echo '

'; echo ''; } } //save meta box data public static function save_meta($post_id, $post) { //verify this came from the our screen and with proper authorization, because save_post can be triggered at other times if(empty($_POST['perfmatters_meta_noncename']) || !wp_verify_nonce($_POST['perfmatters_meta_noncename'], plugin_basename(__FILE__))) { return; } //dont save for revisions if($post->post_type == 'revision') { return; } //saved data $perfmatters_meta = array(); foreach(self::$meta_options as $id => $details) { $key = 'perfmatters_exclude_' . $id; if(!empty($_POST[$key]) || get_post_meta($post->ID, $key, true) != false) { //update option in post meta update_post_meta($post->ID, $key, $_POST[$key] ?? ""); } } } //populate meta options array for other functions private static function get_meta_options() { self::$meta_options = array( 'defer_js' => array( 'name' => __('Defer JavaScript', 'perfmatters'), 'value' => !empty(Config::$options['assets']['defer_js']) ), 'delay_js' => array( 'name' => __('Delay JavaScript', 'perfmatters'), 'value' => !empty(Config::$options['assets']['delay_js']) ), 'unused_css' => array( 'name' => __('Unused CSS', 'perfmatters'), 'value' => !empty(Config::$options['assets']['remove_unused_css']) ), 'lazy_loading' => array( 'name' => __('Lazy Loading', 'perfmatters'), 'value' => !empty(Config::$options['lazyload']['lazy_loading']) || !empty(Config::$options['lazyload']['lazy_loading_iframes']) ), 'instant_page' => array( 'name' => __('Instant Page', 'perfmatters'), 'value' => !empty(Config::$options['preload']['instant_page']) ) ); } }