metadata_exists( string $meta_type, int $object_id, string $meta_key )
Determines if a meta field with the given key exists for the given object ID.
Parameters
- $meta_type
-
(Required) Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
- $object_id
-
(Required) ID of the object metadata is for.
- $meta_key
-
(Required) Metadata key.
Return
(bool) Whether a meta field with the given key exists.
Source
File: wp-includes/meta.php
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.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;
}
Changelog
| Version | Description |
|---|---|
| 3.3.0 | Introduced. |