968 lines
29 KiB
PHP
968 lines
29 KiB
PHP
<?php
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/**
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* Core Metadata API
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*
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* Functions for retrieving and manipulating metadata of various WordPress object types. Metadata
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* for an object is a represented by a simple key-value pair. Objects may contain multiple
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* metadata entries that share the same key and differ only in their value.
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*
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* @package WordPress
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* @subpackage Meta
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*/
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/**
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* Add metadata for the specified object.
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*
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* @since 2.9.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
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* @param int $object_id ID of the object metadata is for
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* @param string $meta_key Metadata key
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* @param mixed $meta_value Metadata value. Must be serializable if non-scalar.
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* @param bool $unique Optional, default is false.
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* Whether the specified metadata key should be unique for the object.
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* If true, and the object already has a value for the specified metadata key,
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* no change will be made.
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* @return int|false The meta ID on success, false on failure.
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*/
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function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = false) {
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global $wpdb;
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if ( ! $meta_type || ! $meta_key || ! is_numeric( $object_id ) ) {
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return false;
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}
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$object_id = absint( $object_id );
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if ( ! $object_id ) {
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return false;
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}
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$table = _get_meta_table( $meta_type );
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if ( ! $table ) {
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return false;
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}
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$column = sanitize_key($meta_type . '_id');
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// expected_slashed ($meta_key)
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$meta_key = wp_unslash($meta_key);
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$meta_value = wp_unslash($meta_value);
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$meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type );
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/**
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* Filter whether to add metadata of a specific type.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user). Returning a non-null value
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* will effectively short-circuit the function.
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*
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* @since 3.1.0
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*
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* @param null|bool $check Whether to allow adding metadata for the given type.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value. Must be serializable if non-scalar.
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* @param bool $unique Whether the specified meta key should be unique
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* for the object. Optional. Default false.
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*/
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$check = apply_filters( "add_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $unique );
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if ( null !== $check )
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return $check;
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if ( $unique && $wpdb->get_var( $wpdb->prepare(
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"SELECT COUNT(*) FROM $table WHERE meta_key = %s AND $column = %d",
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$meta_key, $object_id ) ) )
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return false;
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$_meta_value = $meta_value;
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$meta_value = maybe_serialize( $meta_value );
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/**
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* Fires immediately before meta of a specific type is added.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user).
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*
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* @since 3.1.0
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*
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( "add_{$meta_type}_meta", $object_id, $meta_key, $_meta_value );
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$result = $wpdb->insert( $table, array(
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$column => $object_id,
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'meta_key' => $meta_key,
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'meta_value' => $meta_value
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) );
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if ( ! $result )
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return false;
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$mid = (int) $wpdb->insert_id;
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wp_cache_delete($object_id, $meta_type . '_meta');
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/**
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* Fires immediately after meta of a specific type is added.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user).
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*
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* @since 2.9.0
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*
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* @param int $mid The meta ID after successful update.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value );
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return $mid;
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}
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/**
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* Update metadata for the specified object. If no value already exists for the specified object
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* ID and metadata key, the metadata will be added.
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*
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* @since 2.9.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
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* @param int $object_id ID of the object metadata is for
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* @param string $meta_key Metadata key
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* @param mixed $meta_value Metadata value. Must be serializable if non-scalar.
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* @param mixed $prev_value Optional. If specified, only update existing metadata entries with
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* the specified value. Otherwise, update all entries.
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* @return int|bool Meta ID if the key didn't exist, true on successful update, false on failure.
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*/
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function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_value = '') {
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global $wpdb;
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if ( ! $meta_type || ! $meta_key || ! is_numeric( $object_id ) ) {
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return false;
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}
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$object_id = absint( $object_id );
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if ( ! $object_id ) {
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return false;
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}
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$table = _get_meta_table( $meta_type );
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if ( ! $table ) {
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return false;
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}
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$column = sanitize_key($meta_type . '_id');
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$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
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// expected_slashed ($meta_key)
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$meta_key = wp_unslash($meta_key);
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$passed_value = $meta_value;
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$meta_value = wp_unslash($meta_value);
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$meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type );
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/**
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* Filter whether to update metadata of a specific type.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user). Returning a non-null value
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* will effectively short-circuit the function.
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*
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* @since 3.1.0
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*
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* @param null|bool $check Whether to allow updating metadata for the given type.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value. Must be serializable if non-scalar.
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* @param mixed $prev_value Optional. If specified, only update existing
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* metadata entries with the specified value.
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* Otherwise, update all entries.
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*/
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$check = apply_filters( "update_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $prev_value );
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if ( null !== $check )
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return (bool) $check;
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// Compare existing value to new value if no prev value given and the key exists only once.
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if ( empty($prev_value) ) {
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$old_value = get_metadata($meta_type, $object_id, $meta_key);
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if ( count($old_value) == 1 ) {
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if ( $old_value[0] === $meta_value )
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return false;
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}
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}
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$meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) );
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if ( empty( $meta_ids ) ) {
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return add_metadata($meta_type, $object_id, $meta_key, $passed_value);
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}
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$_meta_value = $meta_value;
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$meta_value = maybe_serialize( $meta_value );
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$data = compact( 'meta_value' );
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$where = array( $column => $object_id, 'meta_key' => $meta_key );
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if ( !empty( $prev_value ) ) {
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$prev_value = maybe_serialize($prev_value);
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$where['meta_value'] = $prev_value;
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}
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foreach ( $meta_ids as $meta_id ) {
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/**
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* Fires immediately before updating metadata of a specific type.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user).
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*
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* @since 2.9.0
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*
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* @param int $meta_id ID of the metadata entry to update.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
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}
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if ( 'post' == $meta_type ) {
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foreach ( $meta_ids as $meta_id ) {
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/**
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* Fires immediately before updating a post's metadata.
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*
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* @since 2.9.0
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*
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* @param int $meta_id ID of metadata entry to update.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
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}
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}
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$result = $wpdb->update( $table, $data, $where );
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if ( ! $result )
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return false;
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wp_cache_delete($object_id, $meta_type . '_meta');
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foreach ( $meta_ids as $meta_id ) {
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/**
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* Fires immediately after updating metadata of a specific type.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user).
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*
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* @since 2.9.0
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*
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* @param int $meta_id ID of updated metadata entry.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
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}
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if ( 'post' == $meta_type ) {
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foreach ( $meta_ids as $meta_id ) {
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/**
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* Fires immediately after updating a post's metadata.
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*
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* @since 2.9.0
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*
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* @param int $meta_id ID of updated metadata entry.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
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}
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}
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return true;
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}
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/**
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* Delete metadata for the specified object.
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*
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* @since 2.9.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
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* @param int $object_id ID of the object metadata is for
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* @param string $meta_key Metadata key
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* @param mixed $meta_value Optional. Metadata value. Must be serializable if non-scalar. If specified, only delete
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* metadata entries with this value. Otherwise, delete all entries with the specified meta_key.
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* Pass `null, `false`, or an empty string to skip this check. (For backward compatibility,
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* it is not possible to pass an empty string to delete those entries with an empty string
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* for a value.)
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* @param bool $delete_all Optional, default is false. If true, delete matching metadata entries for all objects,
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* ignoring the specified object_id. Otherwise, only delete matching metadata entries for
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* the specified object_id.
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* @return bool True on successful delete, false on failure.
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*/
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function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $delete_all = false) {
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global $wpdb;
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if ( ! $meta_type || ! $meta_key || ! is_numeric( $object_id ) && ! $delete_all ) {
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return false;
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}
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$object_id = absint( $object_id );
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if ( ! $object_id && ! $delete_all ) {
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return false;
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}
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$table = _get_meta_table( $meta_type );
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if ( ! $table ) {
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return false;
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}
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$type_column = sanitize_key($meta_type . '_id');
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$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
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// expected_slashed ($meta_key)
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$meta_key = wp_unslash($meta_key);
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$meta_value = wp_unslash($meta_value);
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/**
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* Filter whether to delete metadata of a specific type.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user). Returning a non-null value
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* will effectively short-circuit the function.
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*
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* @since 3.1.0
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*
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* @param null|bool $delete Whether to allow metadata deletion of the given type.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value. Must be serializable if non-scalar.
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* @param bool $delete_all Whether to delete the matching metadata entries
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* for all objects, ignoring the specified $object_id.
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* Default false.
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*/
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$check = apply_filters( "delete_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $delete_all );
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if ( null !== $check )
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return (bool) $check;
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$_meta_value = $meta_value;
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$meta_value = maybe_serialize( $meta_value );
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$query = $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s", $meta_key );
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if ( !$delete_all )
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$query .= $wpdb->prepare(" AND $type_column = %d", $object_id );
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if ( '' !== $meta_value && null !== $meta_value && false !== $meta_value )
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$query .= $wpdb->prepare(" AND meta_value = %s", $meta_value );
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$meta_ids = $wpdb->get_col( $query );
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if ( !count( $meta_ids ) )
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return false;
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if ( $delete_all )
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$object_ids = $wpdb->get_col( $wpdb->prepare( "SELECT $type_column FROM $table WHERE meta_key = %s", $meta_key ) );
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/**
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* Fires immediately before deleting metadata of a specific type.
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*
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* The dynamic portion of the hook, `$meta_type`, refers to the meta
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* object type (comment, post, or user).
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*
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* @since 3.1.0
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*
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* @param array $meta_ids An array of metadata entry IDs to delete.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( "delete_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
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// Old-style action.
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if ( 'post' == $meta_type ) {
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/**
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* Fires immediately before deleting metadata for a post.
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*
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* @since 2.9.0
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*
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* @param array $meta_ids An array of post metadata entry IDs to delete.
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*/
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do_action( 'delete_postmeta', $meta_ids );
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}
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$query = "DELETE FROM $table WHERE $id_column IN( " . implode( ',', $meta_ids ) . " )";
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$count = $wpdb->query($query);
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if ( !$count )
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return false;
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if ( $delete_all ) {
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foreach ( (array) $object_ids as $o_id ) {
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wp_cache_delete($o_id, $meta_type . '_meta');
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}
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} else {
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wp_cache_delete($object_id, $meta_type . '_meta');
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}
|
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|
|
/**
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|
* Fires immediately after deleting metadata of a specific type.
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|
*
|
|
* The dynamic portion of the hook name, `$meta_type`, refers to the meta
|
|
* object type (comment, post, or user).
|
|
*
|
|
* @since 2.9.0
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*
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* @param array $meta_ids An array of deleted metadata entry IDs.
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* @param int $object_id Object ID.
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* @param string $meta_key Meta key.
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* @param mixed $meta_value Meta value.
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*/
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do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
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// Old-style action.
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if ( 'post' == $meta_type ) {
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/**
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|
* Fires immediately after deleting metadata for a post.
|
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*
|
|
* @since 2.9.0
|
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*
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* @param array $meta_ids An array of deleted post metadata entry IDs.
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*/
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do_action( 'deleted_postmeta', $meta_ids );
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}
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return true;
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}
|
|
|
|
/**
|
|
* Retrieve metadata for the specified object.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
|
|
* @param int $object_id ID of the object metadata is for
|
|
* @param string $meta_key Optional. Metadata key. If not specified, retrieve all metadata for
|
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* the specified object.
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* @param bool $single Optional, default is false.
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* If true, return only the first value of the specified meta_key.
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* This parameter has no effect if meta_key is not specified.
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* @return mixed Single metadata value, or array of values
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*/
|
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function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) {
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if ( ! $meta_type || ! is_numeric( $object_id ) ) {
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return false;
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}
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|
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$object_id = absint( $object_id );
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if ( ! $object_id ) {
|
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return false;
|
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}
|
|
|
|
/**
|
|
* Filter whether to retrieve metadata of a specific type.
|
|
*
|
|
* The dynamic portion of the hook, `$meta_type`, refers to the meta
|
|
* object type (comment, post, or user). Returning a non-null value
|
|
* will effectively short-circuit the function.
|
|
*
|
|
* @since 3.1.0
|
|
*
|
|
* @param null|array|string $value The value get_metadata() should return - a single metadata value,
|
|
* or an array of values.
|
|
* @param int $object_id Object ID.
|
|
* @param string $meta_key Meta key.
|
|
* @param bool $single Whether to return only the first value of the specified $meta_key.
|
|
*/
|
|
$check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, $single );
|
|
if ( null !== $check ) {
|
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if ( $single && is_array( $check ) )
|
|
return $check[0];
|
|
else
|
|
return $check;
|
|
}
|
|
|
|
$meta_cache = wp_cache_get($object_id, $meta_type . '_meta');
|
|
|
|
if ( !$meta_cache ) {
|
|
$meta_cache = update_meta_cache( $meta_type, array( $object_id ) );
|
|
$meta_cache = $meta_cache[$object_id];
|
|
}
|
|
|
|
if ( ! $meta_key ) {
|
|
return $meta_cache;
|
|
}
|
|
|
|
if ( isset($meta_cache[$meta_key]) ) {
|
|
if ( $single )
|
|
return maybe_unserialize( $meta_cache[$meta_key][0] );
|
|
else
|
|
return array_map('maybe_unserialize', $meta_cache[$meta_key]);
|
|
}
|
|
|
|
if ($single)
|
|
return '';
|
|
else
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Determine if a meta key is set for a given object
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
|
|
* @param int $object_id ID of the object metadata is for
|
|
* @param string $meta_key Metadata key.
|
|
* @return bool True of the key is set, false if not.
|
|
*/
|
|
function metadata_exists( $meta_type, $object_id, $meta_key ) {
|
|
if ( ! $meta_type || ! is_numeric( $object_id ) ) {
|
|
return false;
|
|
}
|
|
|
|
$object_id = absint( $object_id );
|
|
if ( ! $object_id ) {
|
|
return false;
|
|
}
|
|
|
|
/** This filter is documented in wp-includes/meta-functions.php */
|
|
$check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, true );
|
|
if ( null !== $check )
|
|
return (bool) $check;
|
|
|
|
$meta_cache = wp_cache_get( $object_id, $meta_type . '_meta' );
|
|
|
|
if ( !$meta_cache ) {
|
|
$meta_cache = update_meta_cache( $meta_type, array( $object_id ) );
|
|
$meta_cache = $meta_cache[$object_id];
|
|
}
|
|
|
|
if ( isset( $meta_cache[ $meta_key ] ) )
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get meta data by meta ID
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @param string $meta_type Type of object metadata is for (e.g., comment, post, term, or user).
|
|
* @param int $meta_id ID for a specific meta row
|
|
* @return object|false Meta object or false.
|
|
*/
|
|
function get_metadata_by_mid( $meta_type, $meta_id ) {
|
|
global $wpdb;
|
|
|
|
if ( ! $meta_type || ! is_numeric( $meta_id ) ) {
|
|
return false;
|
|
}
|
|
|
|
$meta_id = absint( $meta_id );
|
|
if ( ! $meta_id ) {
|
|
return false;
|
|
}
|
|
|
|
$table = _get_meta_table( $meta_type );
|
|
if ( ! $table ) {
|
|
return false;
|
|
}
|
|
|
|
$id_column = ( 'user' == $meta_type ) ? 'umeta_id' : 'meta_id';
|
|
|
|
$meta = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $table WHERE $id_column = %d", $meta_id ) );
|
|
|
|
if ( empty( $meta ) )
|
|
return false;
|
|
|
|
if ( isset( $meta->meta_value ) )
|
|
$meta->meta_value = maybe_unserialize( $meta->meta_value );
|
|
|
|
return $meta;
|
|
}
|
|
|
|
/**
|
|
* Update meta data by meta ID
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
|
|
* @param int $meta_id ID for a specific meta row
|
|
* @param string $meta_value Metadata value
|
|
* @param string $meta_key Optional, you can provide a meta key to update it
|
|
* @return bool True on successful update, false on failure.
|
|
*/
|
|
function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key = false ) {
|
|
global $wpdb;
|
|
|
|
// Make sure everything is valid.
|
|
if ( ! $meta_type || ! is_numeric( $meta_id ) ) {
|
|
return false;
|
|
}
|
|
|
|
$meta_id = absint( $meta_id );
|
|
if ( ! $meta_id ) {
|
|
return false;
|
|
}
|
|
|
|
$table = _get_meta_table( $meta_type );
|
|
if ( ! $table ) {
|
|
return false;
|
|
}
|
|
|
|
$column = sanitize_key($meta_type . '_id');
|
|
$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
|
|
|
|
// Fetch the meta and go on if it's found.
|
|
if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
|
|
$original_key = $meta->meta_key;
|
|
$object_id = $meta->{$column};
|
|
|
|
// If a new meta_key (last parameter) was specified, change the meta key,
|
|
// otherwise use the original key in the update statement.
|
|
if ( false === $meta_key ) {
|
|
$meta_key = $original_key;
|
|
} elseif ( ! is_string( $meta_key ) ) {
|
|
return false;
|
|
}
|
|
|
|
// Sanitize the meta
|
|
$_meta_value = $meta_value;
|
|
$meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type );
|
|
$meta_value = maybe_serialize( $meta_value );
|
|
|
|
// Format the data query arguments.
|
|
$data = array(
|
|
'meta_key' => $meta_key,
|
|
'meta_value' => $meta_value
|
|
);
|
|
|
|
// Format the where query arguments.
|
|
$where = array();
|
|
$where[$id_column] = $meta_id;
|
|
|
|
/** This action is documented in wp-includes/meta-functions.php */
|
|
do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
|
|
|
|
if ( 'post' == $meta_type ) {
|
|
/** This action is documented in wp-includes/meta-functions.php */
|
|
do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
|
|
}
|
|
|
|
// Run the update query, all fields in $data are %s, $where is a %d.
|
|
$result = $wpdb->update( $table, $data, $where, '%s', '%d' );
|
|
if ( ! $result )
|
|
return false;
|
|
|
|
// Clear the caches.
|
|
wp_cache_delete($object_id, $meta_type . '_meta');
|
|
|
|
/** This action is documented in wp-includes/meta-functions.php */
|
|
do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
|
|
|
|
if ( 'post' == $meta_type ) {
|
|
/** This action is documented in wp-includes/meta-functions.php */
|
|
do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// And if the meta was not found.
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Delete meta data by meta ID
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @param string $meta_type Type of object metadata is for (e.g., comment, post, term, or user).
|
|
* @param int $meta_id ID for a specific meta row
|
|
* @return bool True on successful delete, false on failure.
|
|
*/
|
|
function delete_metadata_by_mid( $meta_type, $meta_id ) {
|
|
global $wpdb;
|
|
|
|
// Make sure everything is valid.
|
|
if ( ! $meta_type || ! is_numeric( $meta_id ) ) {
|
|
return false;
|
|
}
|
|
|
|
$meta_id = absint( $meta_id );
|
|
if ( ! $meta_id ) {
|
|
return false;
|
|
}
|
|
|
|
$table = _get_meta_table( $meta_type );
|
|
if ( ! $table ) {
|
|
return false;
|
|
}
|
|
|
|
// object and id columns
|
|
$column = sanitize_key($meta_type . '_id');
|
|
$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
|
|
|
|
// Fetch the meta and go on if it's found.
|
|
if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
|
|
$object_id = $meta->{$column};
|
|
|
|
/** This action is documented in wp-includes/meta-functions.php */
|
|
do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
|
|
|
|
// Old-style action.
|
|
if ( 'post' == $meta_type || 'comment' == $meta_type ) {
|
|
/**
|
|
* Fires immediately before deleting post or comment metadata of a specific type.
|
|
*
|
|
* The dynamic portion of the hook, `$meta_type`, refers to the meta
|
|
* object type (post or comment).
|
|
*
|
|
* @since 3.4.0
|
|
*
|
|
* @param int $meta_id ID of the metadata entry to delete.
|
|
*/
|
|
do_action( "delete_{$meta_type}meta", $meta_id );
|
|
}
|
|
|
|
// Run the query, will return true if deleted, false otherwise
|
|
$result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) );
|
|
|
|
// Clear the caches.
|
|
wp_cache_delete($object_id, $meta_type . '_meta');
|
|
|
|
/** This action is documented in wp-includes/meta-functions.php */
|
|
do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
|
|
|
|
// Old-style action.
|
|
if ( 'post' == $meta_type || 'comment' == $meta_type ) {
|
|
/**
|
|
* Fires immediately after deleting post or comment metadata of a specific type.
|
|
*
|
|
* The dynamic portion of the hook, `$meta_type`, refers to the meta
|
|
* object type (post or comment).
|
|
*
|
|
* @since 3.4.0
|
|
*
|
|
* @param int $meta_ids Deleted metadata entry ID.
|
|
*/
|
|
do_action( "deleted_{$meta_type}meta", $meta_id );
|
|
}
|
|
|
|
return $result;
|
|
|
|
}
|
|
|
|
// Meta id was not found.
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Update the metadata cache for the specified objects.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
|
|
* @param int|array $object_ids Array or comma delimited list of object IDs to update cache for
|
|
* @return array|false Metadata cache for the specified objects, or false on failure.
|
|
*/
|
|
function update_meta_cache($meta_type, $object_ids) {
|
|
global $wpdb;
|
|
|
|
if ( ! $meta_type || ! $object_ids ) {
|
|
return false;
|
|
}
|
|
|
|
$table = _get_meta_table( $meta_type );
|
|
if ( ! $table ) {
|
|
return false;
|
|
}
|
|
|
|
$column = sanitize_key($meta_type . '_id');
|
|
|
|
if ( !is_array($object_ids) ) {
|
|
$object_ids = preg_replace('|[^0-9,]|', '', $object_ids);
|
|
$object_ids = explode(',', $object_ids);
|
|
}
|
|
|
|
$object_ids = array_map('intval', $object_ids);
|
|
|
|
$cache_key = $meta_type . '_meta';
|
|
$ids = array();
|
|
$cache = array();
|
|
foreach ( $object_ids as $id ) {
|
|
$cached_object = wp_cache_get( $id, $cache_key );
|
|
if ( false === $cached_object )
|
|
$ids[] = $id;
|
|
else
|
|
$cache[$id] = $cached_object;
|
|
}
|
|
|
|
if ( empty( $ids ) )
|
|
return $cache;
|
|
|
|
// Get meta info
|
|
$id_list = join( ',', $ids );
|
|
$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
|
|
$meta_list = $wpdb->get_results( "SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list) ORDER BY $id_column ASC", ARRAY_A );
|
|
|
|
if ( !empty($meta_list) ) {
|
|
foreach ( $meta_list as $metarow) {
|
|
$mpid = intval($metarow[$column]);
|
|
$mkey = $metarow['meta_key'];
|
|
$mval = $metarow['meta_value'];
|
|
|
|
// Force subkeys to be array type:
|
|
if ( !isset($cache[$mpid]) || !is_array($cache[$mpid]) )
|
|
$cache[$mpid] = array();
|
|
if ( !isset($cache[$mpid][$mkey]) || !is_array($cache[$mpid][$mkey]) )
|
|
$cache[$mpid][$mkey] = array();
|
|
|
|
// Add a value to the current pid/key:
|
|
$cache[$mpid][$mkey][] = $mval;
|
|
}
|
|
}
|
|
|
|
foreach ( $ids as $id ) {
|
|
if ( ! isset($cache[$id]) )
|
|
$cache[$id] = array();
|
|
wp_cache_add( $id, $cache[$id], $cache_key );
|
|
}
|
|
|
|
return $cache;
|
|
}
|
|
|
|
/**
|
|
* Given a meta query, generates SQL clauses to be appended to a main query.
|
|
*
|
|
* @since 3.2.0
|
|
*
|
|
* @see WP_Meta_Query
|
|
*
|
|
* @param array $meta_query A meta query.
|
|
* @param string $type Type of meta.
|
|
* @param string $primary_table Primary database table name.
|
|
* @param string $primary_id_column Primary ID column name.
|
|
* @param object $context Optional. The main query object
|
|
* @return array Associative array of `JOIN` and `WHERE` SQL.
|
|
*/
|
|
function get_meta_sql( $meta_query, $type, $primary_table, $primary_id_column, $context = null ) {
|
|
$meta_query_obj = new WP_Meta_Query( $meta_query );
|
|
return $meta_query_obj->get_sql( $type, $primary_table, $primary_id_column, $context );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the name of the metadata table for the specified object type.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @param string $type Type of object to get metadata table for (e.g., comment, post, or user)
|
|
* @return string|false Metadata table name, or false if no metadata table exists
|
|
*/
|
|
function _get_meta_table($type) {
|
|
global $wpdb;
|
|
|
|
$table_name = $type . 'meta';
|
|
|
|
if ( empty($wpdb->$table_name) )
|
|
return false;
|
|
|
|
return $wpdb->$table_name;
|
|
}
|
|
|
|
/**
|
|
* Determine whether a meta key is protected.
|
|
*
|
|
* @since 3.1.3
|
|
*
|
|
* @param string $meta_key Meta key
|
|
* @param string|null $meta_type
|
|
* @return bool True if the key is protected, false otherwise.
|
|
*/
|
|
function is_protected_meta( $meta_key, $meta_type = null ) {
|
|
$protected = ( '_' == $meta_key[0] );
|
|
|
|
/**
|
|
* Filter whether a meta key is protected.
|
|
*
|
|
* @since 3.2.0
|
|
*
|
|
* @param bool $protected Whether the key is protected. Default false.
|
|
* @param string $meta_key Meta key.
|
|
* @param string $meta_type Meta type.
|
|
*/
|
|
return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type );
|
|
}
|
|
|
|
/**
|
|
* Sanitize meta value.
|
|
*
|
|
* @since 3.1.3
|
|
*
|
|
* @param string $meta_key Meta key
|
|
* @param mixed $meta_value Meta value to sanitize
|
|
* @param string $meta_type Type of meta
|
|
* @return mixed Sanitized $meta_value
|
|
*/
|
|
function sanitize_meta( $meta_key, $meta_value, $meta_type ) {
|
|
|
|
/**
|
|
* Filter the sanitization of a specific meta key of a specific meta type.
|
|
*
|
|
* The dynamic portions of the hook name, `$meta_type`, and `$meta_key`,
|
|
* refer to the metadata object type (comment, post, or user) and the meta
|
|
* key value,
|
|
* respectively.
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @param mixed $meta_value Meta value to sanitize.
|
|
* @param string $meta_key Meta key.
|
|
* @param string $meta_type Meta type.
|
|
*/
|
|
return apply_filters( "sanitize_{$meta_type}_meta_{$meta_key}", $meta_value, $meta_key, $meta_type );
|
|
}
|
|
|
|
/**
|
|
* Register meta key
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @param string $meta_type Type of meta
|
|
* @param string $meta_key Meta key
|
|
* @param string|array $sanitize_callback A function or method to call when sanitizing the value of $meta_key.
|
|
* @param string|array $auth_callback Optional. A function or method to call when performing edit_post_meta, add_post_meta, and delete_post_meta capability checks.
|
|
*/
|
|
function register_meta( $meta_type, $meta_key, $sanitize_callback, $auth_callback = null ) {
|
|
if ( is_callable( $sanitize_callback ) )
|
|
add_filter( "sanitize_{$meta_type}_meta_{$meta_key}", $sanitize_callback, 10, 3 );
|
|
|
|
if ( empty( $auth_callback ) ) {
|
|
if ( is_protected_meta( $meta_key, $meta_type ) )
|
|
$auth_callback = '__return_false';
|
|
else
|
|
$auth_callback = '__return_true';
|
|
}
|
|
|
|
if ( is_callable( $auth_callback ) )
|
|
add_filter( "auth_{$meta_type}_meta_{$meta_key}", $auth_callback, 10, 6 );
|
|
}
|