array_multisort

Syntax:bool array_multisort ( array &$arr [, mixed $arg = SORT_ASC [, mixed $arg = SORT_REGULAR [, mixed $... ]]] )
Description:Sort multiple or multi-dimensional arrays

<?php
$ar1 = array(10, 100, 100, 0);
array_multisort($ar1);

print_r($ar1);
?>
    

OUTPUT

Array ( 
[0] => 0 
[1] => 10 
[2] => 100 
[3] => 100 
)