Encrypt and decrypt in php

encrypt-decrypt.php

$string = "Hello World";

$encrypted = oro_encrypt_string( $string );
$decrypted = oro_decrypt_string( $encrypted );

echo $string . '<br />' . $encrypted . '<br />' . $decrypted;

function oro_encrypt_string( $string, $key = '', $iv = '', $method = '' ) {
    $encrypt_method = empty( $method ) ? 'AES-256-CBC' : $method;
    $secret_key = empty( $key ) ? 'random' : $key;
    $secret_iv  = empty( $iv  ) ? 'random' : $iv;

    // hash
    $key = hash( 'sha256', $secret_key );
    // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
    $iv = substr( hash( 'sha256', $secret_iv ), 0, 16 );

    return base64_encode( openssl_encrypt( $string, $encrypt_method, $key, 0, $iv ) );
}

function oro_decrypt_string( $string, $key = '', $iv = '', $method = '' ) {
    $encrypt_method = empty( $method ) ? 'AES-256-CBC' : $method;
    $secret_key = empty( $key ) ? 'random' : $key;
    $secret_iv  = empty( $iv  ) ? 'random' : $iv;

    // hash
    $key = hash( 'sha256', $secret_key );
    // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
    $iv = substr( hash( 'sha256', $secret_iv ), 0, 16 );

    return openssl_decrypt( base64_decode( $string ), $encrypt_method, $key, 0, $iv );
}

Yep, this is '4 years ago' code and mcrypt_encrypt is obsoleted in PHP 7.1.0.

I'm going to update this gist because of to encrypt/decrypt now I use openssl_encrypt/decrypt.

Good...Go ahead