What is array_multisort() in PHP ?

array_multisort() is using to sort several arrays at once or sort multidimensional array, by one or more dimensions.
In this the associative (string) keys will be maintained but numeric keys will be reindexed.

$array1 = array(23,60,50,70);
$array2 = array(2,3,6,5);
array_multisort($array1 , $array2);

OUTPUT:
var_dump($array1);
array(4)
{
[0] => int(23)
[1] => int(50)
[2] => int(60)
[3] => int(70)
}
var_dump(array2);
array(4)
{
[0] => int(2)
[1] => int(6)
[2] => int(3)
[3] => int(5)
}