Warning: This function is
currently not documented; only the argument list is
available.
Warning: This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change without notice in a future release of PHP.
Use this function at your own risk.
Returns an array representing the pattern of dashes and gaps used to stroke paths.
Return Values
Returns an array on success and empty array if not set.