Create secure string

gen_secure_id

function gen_secure_id($size){
    $char = range("a", "z");
    $numb = range(1, 9);
    $merge = array_merge($char, $numb);

    $string = "";

    for($x=0; $x != $size; $x++){
        $n = "";
        $n = rand(0, count($merge) -1);
        $string .= $merge[$n];
    }

    return trim($string);

}