Purpose: Encrypt a string in alpha numeric only and can be decripted.
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define("ENCRYPTION_KEY", "mykey"); $string = "123456"; //$string = base64_encode($string); echo $encrypted = base64_encode(encrypt($string, ENCRYPTION_KEY)); echo "<br />"; echo $decrypted = decrypt(base64_decode($encrypted), ENCRYPTION_KEY); /** * Returns an encrypted & utf8-encoded */ function encrypt($pure_string, $encryption_key) { $iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB); $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $encrypted_string = mcrypt_encrypt(MCRYPT_BLOWFISH, $encryption_key, utf8_encode($pure_string), MCRYPT_MODE_ECB, $iv); return $encrypted_string; } /** * Returns decrypted original string */ function decrypt($encrypted_string, $encryption_key) { $iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB); $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $decrypted_string = mcrypt_decrypt(MCRYPT_BLOWFISH, $encryption_key, $encrypted_string, MCRYPT_MODE_ECB, $iv); return $decrypted_string; } |