$value =
apply_filters( "default_{
$meta_type}_metadata",
$value,
$object_id,
$meta_key,
$single,
$meta_type );
if ( !
$single && !
wp_is_numeric_array( $value ) ) { $value = array
( $value );
} return $value;
}/**
* Determines if a meta field with the given key exists for the given object ID.
*
* @since 3.3.0
*
* @param string $meta_type Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user',
* or any other object type with an associated meta table.
* @param int $object_id ID of the object metadata is for.
* @param string $meta_key Metadata key.
* @return bool Whether a meta field with the given key exists.
*/