am string $context Optional. Default is 'display'. * @return object|array Same type as $category with sanitized data for safe use. */ function sanitize_category( $category, $context = 'display' ) { return sanitize_term( $category, 'category', $context ); } /** * Sanitizes data in single category key field. * * @since 2.3.0 * * @param string $field Category key to sanitize * @param mixed $value Category value to sanitize * @param int $cat_id Category ID * @param string $context What filter to use, 'raw', 'display', etc. * @return mixed Same type as $value after $value has been sanitized. */ function sanitize_category_field( $field, $value, $cat_id, $context ) { return sanitize_term_field( $field, $value, $cat_id, 'category', $context ); } /* Tags */ /** * Retrieves all post tags. * * @since 2.3.0 * @see get_terms() For list of arguments to pass. * * @param string|array $args Tag arguments to use when retrieving tags. * @return array List of tags. */ function get_tags( $args = '' ) { $tags = get_terms( 'post_tag', $args ); if ( empty( $tags ) ) { $return = array(); return $return; } /** * Filters the array of term objects returned for the 'post_tag' taxonomy. * * @since 2.3.0 * * @param array $tags Array of 'post_tag' term objects. * @param array $args An array of arguments. @see get_terms() */ $tags = apply_filters( 'get_tags', $tags, $args ); return $tags; } /** * Retrieve post tag by tag ID or tag object. * * If you pass the $tag parameter an object, which is assumed to be the tag row * object retrieved the database. It will cache the tag data. * * If you pass $tag an integer of the tag ID, then that tag will * be retrieved from the database, if it isn't already cached, and pass it back. * * If you look at get_term(), then both types will be passed through several * filters and finally sanitized based on the $filter parameter value. * * @since 2.3.0 * * @param int|WP_Term|object $tag A tag ID or object. * @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to * a WP_Term object, an associative array, or a numeric array, respectively. Default OBJECT. * @param string $filter Optional. Default is raw or no WordPress defined filter will applied. * @return WP_Term|array|WP_Error|null Tag data in type defined by $output parameter. WP_Error if $tag is empty, null if it does not exist. */ function get_tag( $tag, $output = OBJECT, $filter = 'raw' ) { return get_term( $tag, 'post_tag', $output, $filter ); } /* Cache */ /** * Remove the category cache data based on ID. * * @since 2.1.0 * * @param int $id Category ID */ function clean_category_cache( $id ) { clean_term_cache( $id, 'category' ); } /** * Update category structure to old pre 2.3 from new taxonomy structure. * * This function was added for the taxonomy support to update the new category * structure with the old category one. This will maintain compatibility with * plugins and themes which depend on the old key or property names. * * The parameter should only be passed a variable and not create the array or * object inline to the parameter. The reason for this is that parameter is * passed by reference and PHP will fail unless it has the variable. * * There is no return value, because everything is updated on the variable you * pass to it. This is one of the features with using pass by reference in PHP. * * @since 2.3.0 * @since 4.4.0 The `$category` parameter now also accepts a WP_Term object. * @access private * * @param array|object|WP_Term $category Category Row object or array */ function _make_cat_compat( &$category ) { if ( is_object( $category ) && ! is_wp_error( $category ) ) { $category->cat_ID = $category->term_id; $category->category_count = $category->count; $category->category_description = $category->description; $category->cat_name = $category->name; $category->category_nicename = $category->slug; $category->category_parent = $category->parent; } elseif ( is_array( $category ) && isset( $category['term_id'] ) ) { $category['cat_ID'] = &$category['term_id']; $category['category_count'] = &$category['count']; $category['category_description'] = &$category['description']; $category['cat_name'] = &$category['name']; $category['category_nicename'] = &$category['slug']; $category['category_parent'] = &$category['parent']; } } re using the cache. if ( '{{unknown}}' === $cache ) { return $this->maybe_make_link( $url ); } if ( ! empty( $cache ) ) { /** * Filters the cached oEmbed HTML. * * @since 2.9.0 * * @see WP_Embed::shortcode() * * @param mixed $cache The cached HTML result, stored in post meta. * @param string $url The attempted embed URL. * @param array $attr An array of shortcode attributes. * @param int $post_ID Post ID. */ return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID ); } } /** * Filters whether to inspect the given URL for discoverable link tags. * * @since 2.9.0 * @since 4.4.0 The default value changed to true. * * @see WP_oEmbed::discover() * * @param bool $enable Whether to enable `` tag discovery. Default true. */ $attr['discover'] = apply_filters( 'embed_oembed_discover', true ); // Use oEmbed to get the HTML. $html = wp_oembed_get( $url, $attr ); if ( $post_ID ) { if ( $html ) { update_post_meta( $post_ID, $cachekey, $html ); update_post_meta( $post_ID, $cachekey_time, time() ); } elseif ( ! $cache ) { update_post_meta( $post_ID, $cachekey, '{{unknown}}' ); } } else { $has_kses = false !== has_filter( 'content_save_pre', 'wp_filter_post_kses' ); if ( $has_kses ) { // Prevent KSES from corrupting JSON in post_content. kses_remove_filters(); } $insert_post_args = array( 'post_name' => $key_suffix, 'post_status' => 'publish', 'post_type' => 'oembed_cache', ); if ( $html ) { if ( $cached_post_id ) { wp_update_post( wp_slash( array( 'ID' => $cached_post_id, 'post_content' => $html, ) ) ); } else { wp_insert_post( wp_slash( array_merge( $insert_post_args, array( 'post_content' => $html, ) ) ) ); } } elseif ( ! $cache ) { wp_insert_post( wp_slash( array_merge( $insert_post_args, array( 'post_content' => '{{unknown}}', ) ) ) ); } if ( $has_kses ) { kses_init_filters(); } } // If there was a result, return it. if ( $html ) { /** This filter is documented in wp-includes/class-wp-embed.php */ return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID ); } // Still unknown return $this->maybe_make_link( $url ); } /** * Delete all oEmbed caches. Unused by core as of 4.0.0. * * @param int $post_ID Post ID to delete the caches for. */ public function delete_oembed_caches( $post_ID ) { $post_metas = get_post_custom_keys( $post_ID ); if ( empty($post_metas) ) return; foreach ( $post_metas as $post_meta_key ) { if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) ) delete_post_meta( $post_ID, $post_meta_key ); } } /** * Triggers a caching of all oEmbed results. * * @param int $post_ID Post ID to do the caching for. */ public function cache_oembed( $post_ID ) { $post = get_post( $post_ID ); $post_types = get_post_types( array( 'show_ui' => true ) ); /** * Filters the array of post types to cache oEmbed results for. * * @since 2.9.0 * * @param array $post_types Array of post types to cache oEmbed results for. Defaults to post types with `show_ui` set to true. */ if ( empty( $post->ID ) || ! in_array( $post->post_type, apply_filters( 'embed_cache_oembed_types', $post_types ) ) ){ return; } // Trigger a caching if ( ! empty( $post->post_content ) ) { $this->post_ID = $post->ID; $this->usecache = false; $content = $this->run_shortcode( $post->post_content ); $this->autoembed( $content ); $this->usecache = true; } } /** * Passes any unlinked URLs that are on their own line to WP_Embed::shortcode() for potential embedding. * * @see WP_Embed::autoembed_callback() * * @param string $content The content to be searched. * @return string Potentially modified $content. */ public function autoembed( $content ) { // Replace line breaks from all HTML elements with placeholders. $content = wp_replace_in_html_tags( $content, array( "\n" => '' ) ); if ( preg_match( '#(^|\s|>)https?://#i', $content ) ) { // Find URLs on their own line. $content = preg_replace_callback( '|^(\s*)(https?://[^\s<>"]+)(\s*)$|im', array( $this, 'autoembed_callback' ), $content ); // Find URLs in their own paragraph. $content = preg_replace_callback( '|(]*)?>\s*)(https?://[^\s<>"]+)(\s*<\/p>)|i', array( $this, 'autoembed_callback' ), $content ); } // Put the line breaks back. return str_replace( '', "\n", $content ); } /** * Callback function for WP_Embed::autoembed(). * * @param array $match A regex match array. * @return string The embed HTML on success, otherwise the original URL. */ public function autoembed_callback( $match ) { $oldval = $this->linkifunknown; $this->linkifunknown = false; $return = $this->shortcode( array(), $match[2] ); $this->linkifunknown = $oldval; return $match[1] . $return . $match[3]; } /** * Conditionally makes a hyperlink based on an internal class variable. * * @param string $url URL to potentially be linked. * @return false|string Linked URL or the original URL. False if 'return_false_on_fail' is true. */ public function maybe_make_link( $url ) { if ( $this->return_false_on_fail ) { return false; } $output = ( $this->linkifunknown ) ? '' . esc_html($url) . '' : $url; /** * Filters the returned, maybe-linked embed URL. * * @since 2.9.0 * * @param string $output The linked or original URL. * @param string $url The original URL. */ return apply_filters( 'embed_maybe_make_link', $output, $url ); } /** * Find the oEmbed cache post ID for a given cache key. * * @since 4.9.0 * * @param string $cache_key oEmbed cache key. * @return int|null Post ID on success, null on failure. */ public function find_oembed_post_id( $cache_key ) { $cache_group = 'oembed_cache_post'; $oembed_post_id = wp_cache_get( $cache_key, $cache_group ); if ( $oembed_post_id && 'oembed_cache' === get_post_type( $oembed_post_id ) ) { return $oembed_post_id; } $oembed_post_query = new WP_Query( array( 'post_type' => 'oembed_cache', 'post_status' => 'publish', 'name' => $cache_key, 'posts_per_page' => 1, 'no_found_rows' => true, 'cache_results' => true, 'update_post_meta_cache' => false, 'update_post_term_cache' => false, 'lazy_load_term_meta' => false, ) ); if ( ! empty( $oembed_post_query->posts ) ) { // Note: 'fields'=>'ids' is not being used in order to cache the post object as it will be needed. $oembed_post_id = $oembed_post_query->posts[0]->ID; wp_cache_set( $cache_key, $oembed_post_id, $cache_group ); return $oembed_post_id; } return null; } } f there are none, we register the widget's existence with a generic template. $this->_set( 1 ); $this->_register_one(); } } /** * Sets the internal order number for the widget instance. * * @since 2.8.0 * * @param int $number The unique order number of this widget instance compared to other * instances of the same class. */ public function _set($number) { $this->number = $number; $this->id = $this->id_base . '-' . $number; } /** * Retrieves the widget display callback. * * @since 2.8.0 * * @return callable Display callback. */ public function _get_display_callback() { return array($this, 'display_callback'); } /** * Retrieves the widget update callback. * * @since 2.8.0 * * @return callable Update callback. */ public function _get_update_callback() { return array($this, 'update_callback'); } /** * Retrieves the form callback. * * @since 2.8.0 * * @return callable Form callback. */ public function _get_form_callback() { return array($this, 'form_callback'); } /** * Determines whether the current request is inside the Customizer preview. * * If true -- the current request is inside the Customizer preview, then * the object cache gets suspended and widgets should check this to decide * whether they should store anything persistently to the object cache, * to transients, or anywhere else. * * @since 3.9.0 * * @global WP_Customize_Manager $wp_customize * * @return bool True if within the Customizer preview, false if not. */ public function is_preview() { global $wp_customize; return ( isset( $wp_customize ) && $wp_customize->is_preview() ) ; } /** * Generates the actual widget content (Do NOT override). * * Finds the instance and calls WP_Widget::widget(). * * @since 2.8.0 * * @param array $args Display arguments. See WP_Widget::widget() for information * on accepted arguments. * @param int|array $widget_args { * Optional. Internal order number of the widget instance, or array of multi-widget arguments. * Default 1. * * @type int $number Number increment used for multiples of the same widget. * } */ public function display_callback( $args, $widget_args = 1 ) { if ( is_numeric( $widget_args ) ) { $widget_args = array( 'number' => $widget_args ); } $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) ); $this->_set( $widget_args['number'] ); $instances = $this->get_settings(); if ( array_key_exists( $this->number, $instances ) ) { $instance = $instances[ $this->number ]; /** * Filters the settings for a particular widget instance. * * Returning false will effectively short-circuit display of the widget. * * @since 2.8.0 * * @param array $instance The current widget instance's settings. * @param WP_Widget $this The current widget instance. * @param array $args An array of default widget arguments. */ $instance = apply_filters( 'widget_display_callback', $instance, $this, $args ); if ( false === $instance ) { return; } $was_cache_addition_suspended = wp_suspend_cache_addition(); if ( $this->is_preview() && ! $was_cache_addition_suspended ) { wp_suspend_cache_addition( true ); } $this->widget( $args, $instance ); if ( $this->is_preview() ) { wp_suspend_cache_addition( $was_cache_addition_suspended ); } } } /** * Handles changed settings (Do NOT override). * * @since 2.8.0 * * @global array $wp_registered_widgets * * @param int $deprecated Not used. */ public function update_callback( $deprecated = 1 ) { global $wp_registered_widgets; $all_instances = $this->get_settings(); // We need to update the data if ( $this->updated ) return; if ( isset($_POST['delete_widget']) && $_POST['delete_widget'] ) { // Delete the settings for this instance of the widget if ( isset($_POST['the-widget-id']) ) $del_id = $_POST['the-widget-id']; else return; if ( isset($wp_registered_widgets[$del_id]['params'][0]['number']) ) { $number = $wp_registered_widgets[$del_id]['params'][0]['number']; if ( $this->id_base . '-' . $number == $del_id ) unset($all_instances[$number]); } } else { if ( isset($_POST['widget-' . $this->id_base]) && is_array($_POST['widget-' . $this->id_base]) ) { $settings = $_POST['widget-' . $this->id_base]; } elseif ( isset($_POST['id_base']) && $_POST['id_base'] == $this->id_base ) { $num = $_POST['multi_number'] ? (int) $_POST['multi_number'] : (int) $_POST['widget_number']; $settings = array( $num => array() ); } else { return; } foreach ( $settings as $number => $new_instance ) { $new_instance = stripslashes_deep($new_instance); $this->_set($number); $old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array(); $was_cache_addition_suspended = wp_suspend_cache_addition(); if ( $this->is_preview() && ! $was_cache_addition_suspended ) { wp_suspend_cache_addition( true ); } $instance = $this->update( $new_instance, $old_instance ); if ( $this->is_preview() ) { wp_suspend_cache_addition( $was_cache_addition_suspended ); } /** * Filters a widget's settings before saving. * * Returning false will effectively short-circuit the widget's ability * to update settings. * * @since 2.8.0 * * @param array $instance The current widget instance's settings. * @param array $new_instance Array of new widget settings. * @param array $old_instance Array of old widget settings. * @param WP_Widget $this The current widget instance. */ $instance = apply_filters( 'widget_update_callback', $instance, $new_instance, $old_instance, $this ); if ( false !== $instance ) { $all_instances[$number] = $instance; } break; // run only once } } $this->save_settings($all_instances); $this->updated = true; } /** * Generates the widget control form (Do NOT override). * * @since 2.8.0 * * @param int|array $widget_args { * Optional. Internal order number of the widget instance, or array of multi-widget arguments. * Default 1. * * @type int $number Number increment used for multiples of the same widget. * } * @return string|null */ public function form_callback( $widget_args = 1 ) { if ( is_numeric($widget_args) ) $widget_args = array( 'number' => $widget_args ); $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) ); $all_instances = $this->get_settings(); if ( -1 == $widget_args['number'] ) { // We echo out a form where 'number' can be set later $this->_set('__i__'); $instance = array(); } else { $this->_set($widget_args['number']); $instance = $all_instances[ $widget_args['number'] ]; } /** * Filters the widget instance's settings before displaying the control form. * * Returning false effectively short-circuits display of the control form. * * @since 2.8.0 * * @param array $instance The current widget instance's settings. * @param WP_Widget $this The current widget instance. */ $instance = apply_filters( 'widget_form_callback', $instance, $this ); $return = null; if ( false !== $instance ) { $return = $this->form($instance); /** * Fires at the end of the widget control form. * * Use this hook to add extra fields to the widget form. The hook * is only fired if the value passed to the 'widget_form_callback' * hook is not false. * * Note: If the widget has no form, the text echoed from the default * form method can be hidden using CSS. * * @since 2.8.0 * * @param WP_Widget $this The widget instance (passed by reference). * @param null $return Return null if new fields are added. * @param array $instance An array of the widget's settings. */ do_action_ref_array( 'in_widget_form', array( &$this, &$return, $instance ) ); } return $return; } /** * Registers an instance of the widget class. * * @since 2.8.0 * * @param integer $number Optional. The unique order number of this widget instance * compared to other instances of the same class. Default -1. */ public function _register_one( $number = -1 ) { wp_register_sidebar_widget( $this->id, $this->name, $this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) ); _register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) ); _register_widget_form_callback( $this->id, $this->name, $this->_get_form_callback(), $this->control_options, array( 'number' => $number ) ); } /** * Saves the settings for all instances of the widget class. * * @since 2.8.0 * * @param array $settings Multi-dimensional array of widget instance settings. */ public function save_settings( $settings ) { $settings['_multiwidget'] = 1; update_option( $this->option_name, $settings ); } /** * Retrieves the settings for all instances of the widget class. * * @since 2.8.0 * * @return array Multi-dimensional array of widget instance settings. */ public function get_settings() { $settings = get_option( $this->option_name ); if ( false === $settings ) { if ( isset( $this->alt_option_name ) ) { $settings = get_option( $this->alt_option_name ); } else { // Save an option so it can be autoloaded next time. $this->save_settings( array() ); } } if ( ! is_array( $settings ) && ! ( $settings instanceof ArrayObject || $settings instanceof ArrayIterator ) ) { $settings = array(); } if ( ! empty( $settings ) && ! isset( $settings['_multiwidget'] ) ) { // Old format, convert if single widget. $settings = wp_convert_widget_settings( $this->id_base, $this->option_name, $settings ); } unset( $settings['_multiwidget'], $settings['__i__'] ); return $settings; } }
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