encrypt 2fdecrypt data php

1function encrypt_decrypt($string, $action = 'encrypt')
2{
3    $encrypt_method = "AES-256-CBC";
4    $secret_key = 'AA74CDCC2BBRT935136HH7B63C27'; // user define private key
5    $secret_iv = '5fgf5HJ5g27'; // user define secret key
6    $key = hash('sha256', $secret_key);
7    $iv = substr(hash('sha256', $secret_iv), 0, 16); // sha256 is hash_hmac_algo
8    if ($action == 'encrypt') {
9        $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
10        $output = base64_encode($output);
11    } else if ($action == 'decrypt') {
12        $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
13    }
14    return $output;
15}
16 
17echo "Your Encrypted password is = ". $pwd = encrypt_decrypt('spaceo', 'encrypt');
18echo "Your Decrypted password is = ". encrypt_decrypt($pwd, 'decrypt');
19

1//Key
2$key = 'SuperSecretKey';
3
4//To Encrypt:
5$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, 'I want to encrypt this', MCRYPT_MODE_ECB);
6
7//To Decrypt:
8$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $encrypted, MCRYPT_MODE_ECB);
9