Posting data via JSON object using curl in the command line

I am trying to post data from one server to another server via the command line. Eventually, I will use real data, but for now I just want to test that it works, which it doesn't.

In the command line for server1 I am using curl to send data via JSON and in my other server I have a method where I receive the JSON object, decode it and print it out, however here is where I have the problem.

Without sending a JSON object, everything works fine: I can print "sample sentence", which shows that my method is being reached and works.

However when I send a JSON object, it prints all of the details from my .env file, and nothing from the object I sent, which I don't understand.

I have tried writing the curl in so many different ways but nothing seems to work.

The curl from server 1:

curl -X POST -H "Content-Type: application/json" \
-d '{"orderId":12345,"customerNr":98765}' \
https://returns.jdoe.blah.test/createReturn

The routing from web.php on server 2:

Route::post('/createReturn', 'ProductReturnsController@createReturn');

The method from the controller ProductReturnsController.php on server 2:

    public function createReturn($json)
    {
        echo "hallo\n";

        $jsonDecoded = json_decode($json);

        echo $jsonDecoded->orderId;

        print_r($jsonDecoded);

        //return view('data');
    }

I have the view commented out for now, as I want to make sure that I can send and receive a JSON object first.

The output after I run the curl in the command line is as follows:

>"<span class=sf-dump-str title="3 characters">120</span>"
</pre><script>Sfdump("sf-dump-686665084")</script>
</td>
              </tr>
                          <tr>
                <td>REDIS_HOST</td>
                <td><pre class=sf-dump id=sf-dump-15249655 data-indent-pad="  ">"<span class=sf-dump-str title="9 characters">127.0.0.1</span>"
</pre><script>Sfdump("sf-dump-15249655")</script>
</td>
              </tr>
                          <tr>
                <td>REDIS_PASSWORD</td>
                <td><pre class=sf-dump id=sf-dump-1240246613 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">null</span>"
</pre><script>Sfdump("sf-dump-1240246613")</script>
</td>
              </tr>
                          <tr>
                <td>REDIS_PORT</td>
                <td><pre class=sf-dump id=sf-dump-2128112850 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">6379</span>"
</pre><script>Sfdump("sf-dump-2128112850")</script>
</td>
              </tr>
                          <tr>
                <td>MAIL_DRIVER</td>
                <td><pre class=sf-dump id=sf-dump-89924640 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">smtp</span>"
</pre><script>Sfdump("sf-dump-89924640")</script>
</td>
              </tr>
                          <tr>
                <td>MAIL_HOST</td>
                <td><pre class=sf-dump id=sf-dump-298105600 data-indent-pad="  ">"<span class=sf-dump-str title="16 characters">smtp.mailtrap.io</span>"
</pre><script>Sfdump("sf-dump-298105600")</script>
</td>
              </tr>
                          <tr>
                <td>MAIL_PORT</td>
                <td><pre class=sf-dump id=sf-dump-1783830794 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">2525</span>"
</pre><script>Sfdump("sf-dump-1783830794")</script>
</td>
              </tr>
                          <tr>
                <td>MAIL_USERNAME</td>
                <td><pre class=sf-dump id=sf-dump-18572966 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">null</span>"
</pre><script>Sfdump("sf-dump-18572966")</script>
</td>
              </tr>
                          <tr>
                <td>MAIL_PASSWORD</td>
                <td><pre class=sf-dump id=sf-dump-1965143115 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">null</span>"
</pre><script>Sfdump("sf-dump-1965143115")</script>
</td>
              </tr>
                          <tr>
                <td>MAIL_ENCRYPTION</td>
                <td><pre class=sf-dump id=sf-dump-384128930 data-indent-pad="  ">"<span class=sf-dump-str title="4 characters">null</span>"
</pre><script>Sfdump("sf-dump-384128930")</script>
</td>
              </tr>
                          <tr>
                <td>AWS_ACCESS_KEY_ID</td>
                <td><pre class=sf-dump id=sf-dump-1978382159 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-1978382159")</script>
</td>
              </tr>
                          <tr>
                <td>AWS_SECRET_ACCESS_KEY</td>
                <td><pre class=sf-dump id=sf-dump-593039413 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-593039413")</script>
</td>
              </tr>
                          <tr>
                <td>AWS_DEFAULT_REGION</td>
                <td><pre class=sf-dump id=sf-dump-1272900874 data-indent-pad="  ">"<span class=sf-dump-str title="9 characters">us-east-1</span>"
</pre><script>Sfdump("sf-dump-1272900874")</script>
</td>
              </tr>
                          <tr>
                <td>AWS_BUCKET</td>
                <td><pre class=sf-dump id=sf-dump-1804584219 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-1804584219")</script>
</td>
              </tr>
                          <tr>
                <td>PUSHER_APP_ID</td>
                <td><pre class=sf-dump id=sf-dump-95334387 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-95334387")</script>
</td>
              </tr>
                          <tr>
                <td>PUSHER_APP_KEY</td>
                <td><pre class=sf-dump id=sf-dump-1487081807 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-1487081807")</script>
</td>
              </tr>
                          <tr>
                <td>PUSHER_APP_SECRET</td>
                <td><pre class=sf-dump id=sf-dump-1935165849 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-1935165849")</script>
</td>
              </tr>
                          <tr>
                <td>PUSHER_APP_CLUSTER</td>
                <td><pre class=sf-dump id=sf-dump-1333546276 data-indent-pad="  ">"<span class=sf-dump-str title="3 characters">mt1</span>"
</pre><script>Sfdump("sf-dump-1333546276")</script>
</td>
              </tr>
                          <tr>
                <td>MIX_PUSHER_APP_KEY</td>
                <td><pre class=sf-dump id=sf-dump-1872466253 data-indent-pad="  ">""
</pre><script>Sfdump("sf-dump-1872466253")</script>
</td>
              </tr>
                          <tr>
                <td>MIX_PUSHER_APP_CLUSTER</td>
                <td><pre class=sf-dump id=sf-dump-1866771313 data-indent-pad="  ">"<span class=sf-dump-str title="3 characters">mt1</span>"
</pre><script>Sfdump("sf-dump-1866771313")</script>
</td>
              </tr>
                          <tr>
                <td>LDAP_USERNAME</td>
                <td><pre class=sf-dump id=sf-dump-2006453280 data-indent-pad="  ">"<span class=sf-dump-str title="18 characters">[email protected]</span>"
</pre><script>Sfdump("sf-dump-2006453280")</script>
</td>
              </tr>
                          <tr>
                <td>LDAP_PASSWORD</td>
                <td><pre class=sf-dump id=sf-dump-1985838971 data-indent-pad=" 
">"<span class=sf-dump-str title="10 characters">XXXXXXXXXX</span>"
</pre><script>Sfdump("sf-dump-1985838971")</script>
</td>
              </tr>
                        </table>
              </div>
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As I am passing orderId, I am expecting to see "12345", when I echo the orderId.

Please can anyone explain what I am doing wrong?

EDIT: When I run the following, and I don't decode the JSON in createReturn, it prints "hallo" in the console as expected:

curl --header "Content-Type: application/json" \
--data '{"orderId":12345,"customerNr":98765}' \
https://returns.jdoe.blah.test/createReturn

However, when I run the above curl and try to decode the JSON in createReturn, it prints the whole html file as mentioned above. So it seems to have something to do with the JSON decoding, maybe?