Mcrypt js encryption value is different than that produced by PHP mcrypt / Mcrypt JS decrypt doesn’t work for UTF-8 chars
The main issue appears to be that your string_encrypt and string_decrypt PHP functions don’t have access to the $key variable, so for the encryption key mcrypt_encrypt is using \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0. See this question for an explanation. PHP should report a notice that key is undefined, have you turned off error reporting perhaps? Echo the key from … Read more