Hello readers, today we discuss about "Generate a random, unique password or alphanumeric string" using Php function.

function random_string($len) {
    $key = '';
    $keys = array_merge(range(0, 9));

    for ($i = 0; $i < $len; $i++) {
        $key .= $keys[array_rand($keys)];
    }

    return $key;
}

echo random_string(4);

In above code the password should be only come in integer and the length is 4 digit.

If you want alphanumeric string and the output length more than 4 so you can use the below code.

  function random_string($len) {
        $key = '';
        $keys = array_merge(range(0, 9), range('a', 'z'));

        for ($i = 0; $i < $len; $i++) {
            $key .= $keys[array_rand($keys)];
        }

        return $key;
    }

    echo random_string(10);