How to properly encrypt text in openssl?

Question

PHP

Hello.
I need to encrypt a string in php and decrypt in python with regular AES-256-ECB.
here is the code:

function create_hash($var1, $var2, $var3) {

    $key = 'hVyzdDQmDqanzkUDowPtere17cvNN3Lm';
    $input_string = $var1 . ' ' . $var2 . ' ' . $var3;

    $hash = openssl_encrypt($input_string, 'AES-256-ECB', $key);

    //make hash url safety
    $hash = strtr( $hash, '+/', '-_' );

    return $hash;
}

But when decrypting in Python, extra characters are often added to the string:

if you add OPENSSL_ZERO_PADDIN to the options for openssl_encrypt, then the extra characters disappear, but another problem appears. Now you can get an error when encrypting

error:0607F08A:digital envelope routines:EVP_EncryptFinal_ex:data not multiple of block length

As far as I understand, so that there would be no problems, the encrypted string must be a multiple of the length? eight? sixteen? How to finish up to multiplicity, pad with spaces?