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uksort() function in PHP

The uksort() function used for sorts an associative array by keys using a user defined function.

Syntax

uksort(array,yourfunction);

Example

function cmpfun($a,$b){
    if ($a==$b) return 0;
    return ($a<$b)?-1:1;
}

$array=array("a"=>4,"b"=>2,"c"=>8);
uksort($array,"cmpfun");
print_r($array);

Output

Array ( [a] => 4 [b] => 2 [c] => 8 )

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