<?php
function encrypt_pkcs7($str, $key)
{
$pad = $block - (strlen($str) % $block);
$ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128
, $key, $str, MCRYPT_MODE_ECB
); }
echo encrypt_pkcs7('test', '123456');
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