Generate and Random Password in PHP

function RandPassword($length)

{

srand(date("s"));

$charactors = "abcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";

$string = "";

while(strlen($string)<$length)

{

$string .= substr($charactors, rand()%(strlen($charactors))),1);

}

return($string);

}

echo RandPassword(7);