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Editorial Team
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Asked: 2026-06-09T09:08:55+00:00

I want to sent message from my server to phone, by PHP. Here is

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I want to sent message from my server to phone, by PHP.
Here is my code:

    $apiKey = "AIxxxxxxxxxxxxxxxxxxxx";

    $registrationIDs = array( $c2dmId );

    $url = "https://android.googleapis.com/gcm/send";

    $headers = array( 
                        'Authorization: key='.$apiKey,
                        'Content-Type: application/json'
                    );

    $fields = array(
                    'collapse_key'      => $collapseKey,
                    'data'              => array( 
                        "type"      => $msgType,
                        "extra"     => $msgExtra,
                        "uuid"      => $uuid,
                        "user_id"   => $userId),
                    'registration_ids'  => $registrationIDs,
                    );

    print (json_encode($fields));
    echo "<br/>";

    $ch = curl_init();

    curl_setopt( $ch, CURLOPT_URL, $url );

    curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );

    curl_setopt( $ch, CURLOPT_POST, true );
    curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );

    $result = curl_exec($ch);
    $resultInfo = curl_getinfo($ch);

    echo "resultinfo: $resultInfo <br>";
    foreach ($resultInfo as $key => $value) {
        echo "$key => $value <br>";
    }

    curl_close($ch);
    die ("Result: $result");

Where $c2dmId is just registrationId which I send to server from phone. As a result I get (in $result variable):

<HTML>
<HEAD>
<TITLE>Not Found</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Not Found</H1>
<H2>Error 404</H2>
</BODY>
</HTML>

And I don’t know why. Can anyone help? Documentation dosen’t say anything about 404 code, so I really don’t know what is going on.

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1 Answer

  1. Editorial Team

    Oh, I completely forgot about this question, sorry for that. I already find out what was the problem.
    Earlier I used that code which I posted before to send messages via C2DM. I made only a few improvements to adjust it to GCM. And one of variables ($msgExtra) could equal null in some case. It was intended behaviour and with C2DM it worked just fine.
    Unfortunately, when you try to pass null in JSON via GCM you get 404 error, although GCM documentation says nothing about that…
    So code which I posted is good as far as you don’t try to send null.
    Solution of my problem is to replace null value with something like “”.
    And once again – sorry that I post it just now, I completely forgot about this question.

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