Encrypt in VB.NET and Decrypt in PHP 4 Using Phpseclib0.3.0

This specific content was written 12 years ago. Please keep this in mind as it may be outdated and not adhering to best-practices.

Originally I had found code from: Encrypt in VB.NET and Decrypt in PHP and Vice Versa .

Everything worked well, until I realized that the specific webserver I was writing code for ran PHP 4…No mcrypt_decrypt.

Hence I discovered PHPSecLib has the Rijndael algorithm implemented as PHP code.
Following please find code to check if mcrypt exists and react differently (where $line is the encrypted text):

$dec = decryptRJ256($ky, $iv, $line);
$dec = decryptRJ256_PHPSECLIB($ky, $iv, $line);