mcrypt.php

$testString = "test";
$modes = mcrypt_list_modes();
$algorithms = mcrypt_list_algorithms();
var_dump($modes, $algorithms);
foreach($algorithms as $cipher)
{
    echo "<h1 style=\"border-top:1px solid black;\">".$cipher."</h1>\n";
    foreach($modes as $mode)
    {
        $keySize = mcrypt_get_key_size($cipher, $mode);
        $key = randString($keySize);
        $iv_size = mcrypt_get_iv_size($cipher, $mode);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        $encrypted_string = mcrypt_encrypt($cipher, $key, utf8_encode($testString), $mode, $iv);

        $str = urlencode(base64_encode($encrypted_string));

        echo "$mode:$keySize - <code>". $str ."</code> - ".strlen($str)."<br>";

    }
}

function randString($length, $charset='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789')
{
    $str = '';
    $count = strlen($charset);
    while ($length--) {
        $str .= $charset[mt_rand(0, $count-1)];
    }
    return $str;
}