Removes last item on a pipe-delimited string.

Meant for removing the last item in a string, such as ‘Role name|User role’. The original
string will be returned if no pipe ‘|’ characters are found in the string.

function before_last_bar( $string ) {
	$last_bar = strrpos( $string, '|' );
	if ( false === $last_bar ) {
		return $string;
	} else {
		return substr( $string, 0, $last_bar );
	}
}