dump()
dump(mixed $array) : void
Utility for debugging.
Parameters
| mixed | $array | values to print out |
mergesort( $array, callable $cmp_function) : void
Sort array but maintain index when compared items are equal.
http://www.php.net/manual/en/function.usort.php#38827
| $array | ||
| callable | $cmp_function | custom function to compare values |