encryptMD5

index.php

<?php
/*
     *  Function create encrypt MD5
     *  Remember mcrypt_encrypt() not support PHP 7.0
     */
    public  function encryptMD5($string) {
        $qEncoded  = base64_encode(mcrypt_encrypt( MCRYPT_RIJNDAEL_256, md5('[MÃ_KEY]'), $string, MCRYPT_MODE_CBC, md5( md5(['[MÃ_KEY]']) ) ) );
        return $qEncoded;
    }

    /*
     *  Function create decrypt MD5
     *  Remember mcrypt_encrypt() not support PHP 7.0
     */
    public function decryptMD5($string) {
        //Find whitespace and replace to '+'
        $string = preg_replace('/\s+/','+',$string);
        $qDecoded   = rtrim(mcrypt_decrypt( MCRYPT_RIJNDAEL_256, md5('[MÃ_KEY]'), base64_decode($string), MCRYPT_MODE_CBC, md5( md5(['[MÃ_KEY]']) ) ), "\0");
        return $qDecoded;
    }