AES—256—CBC加密在Python和PHP中返回不同的结果，HELPPP

Python代码:

     from Crypto.Random import get_random_bytes
     from Crypto.Cipher import AES
     from Crypto.Util.Padding import pad
     import base64

     def encrypt_string(input_string, key_base64, str_iv):
         try:
            key = key_base64.encode('utf-8')
        
            if str_iv:
               iv = base64.b64decode(str_iv)
            else:
               iv = get_random_bytes(16)

            cipher = AES.new(key, AES.MODE_CBC, iv)
            padded_data = pad(input_string.encode(), AES.block_size)
            cipher_data = cipher.encrypt(padded_data)
            combined_data = iv + cipher_data
            return base64.b64encode(combined_data).decode()

         except Exception as e:
            print(e)

    if __name__ == "__main__":
        key = "1bd393e7a457f9023d9ba95fffb5a2e1"
        iv = "1oTOhV9xGyu1mppmWZWa5w=="
        input_string = "AAAAAAA"
        encrypted_data = encrypt_string(input_string, key, iv)
        print("Encrypted string:", encrypted_data)`

输出: 加密字符串:1oTOhV9xGyu1mppmWZWa5 + kzveiTRzRH + gRVHx +7Ad0 =

PHP代码:

      <?php
       function encrypt_string($input_string, $key_base64, $str_iv) {
        try {
         $key = base64_decode($key_base64);

        if ($str_iv) {
            $iv = base64_decode($str_iv);
        } else {
            $iv = openssl_random_pseudo_bytes(16);
        }
        $ciphertext = openssl_encrypt($input_string, 'aes-256-cbc', $key, OPENSSL_RAW_DATA, $iv);
        $combined_data = $iv . $ciphertext;
        return base64_encode($combined_data);
       } catch (Exception $e) {
        echo $e->getMessage();
       }
      }
      $key = "1bd393e7a457f9023d9ba95fffb5a2e1";
       $iv = "1oTOhV9xGyu1mppmWZWa5w==";
       $input_string = "AAAAAAA";
       $encrypted_data = encrypt_string($input_string, $key, $iv);
       echo "Encrypted string: " . $encrypted_data . "\n";
      ?>

输出: 加密字符串:1oTOhV9xGyu1mppmWZWa53Nc8rxWTultBWLvWitUICQ =

请问，有谁知道如何使这两个代码的输出相同？