get_metadata_by_mid() WP 3.3.0
Retrieves metadata by meta ID.
Хуки из функции
Возвращает
stdClass/false. Metadata object, or boolean false if the metadata doesn't exist.
Использование
get_metadata_by_mid( $meta_type, $meta_id );
- $meta_type(строка) (обязательный)
- Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
- $meta_id(число) (обязательный)
- ID for a specific meta row.
Заметки
- Global. wpdb. $wpdb WordPress database abstraction object.
Список изменений
С версии 3.3.0 | Введена. |
Код get_metadata_by_mid() get metadata by mid WP 5.6.2
function get_metadata_by_mid( $meta_type, $meta_id ) {
global $wpdb;
if ( ! $meta_type || ! is_numeric( $meta_id ) || floor( $meta_id ) != $meta_id ) {
return false;
}
$meta_id = (int) $meta_id;
if ( $meta_id <= 0 ) {
return false;
}
$table = _get_meta_table( $meta_type );
if ( ! $table ) {
return false;
}
/**
* Short-circuits the return value when fetching a meta field by meta ID.
*
* The dynamic portion of the hook, `$meta_type`, refers to the meta object type
* (post, comment, term, user, or any other type with an associated meta table).
* Returning a non-null value will effectively short-circuit the function.
*
* @since 5.0.0
*
* @param stdClass|null $value The value to return.
* @param int $meta_id Meta ID.
*/
$check = apply_filters( "get_{$meta_type}_metadata_by_mid", null, $meta_id );
if ( null !== $check ) {
return $check;
}
$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;
}