用于推送通知的Php脚本没有返回任何内容

我有这个脚本发送推送通知在我的android应用程序:

<?php
// Replace with real BROWSER API key from Google APIs
$apiKey = "AIzaSyAATjQOVDdOUiHra0H-EfxpobQcqOsdwqa";
// Replace with real client registration IDs. Put the correct registration id you are getting from app. If you are using eclipse check your logcat you will get it there.
$registrationIDs = array("APA91bEmxWS9bsXLsixaYQ6zuByM0SzFWe5DEKVLO68923hW3Mo2qB6bIH2LarP5WgzKasMtFAdVyy8YQuwv0YbrRNwdGFORh1wQvQ9uKBkC3jH6uXBYAQOv5xfzrsjYjqcQK8syikrQ6dq6oRrp9XUnimdj_4oBbw" );
// Message to be sent
$message = "Push working!";

// Set POST variables.
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
        'registration_ids'  => $registrationIDs,
        'data'              => array( "message" => $message ) /*Make sure that message is the key you are using in GCMIntentService.java onMessage() ->  extras.getString("message");*/
);
$headers = array(
        'Authorization: key=' . $apiKey,
        'Content-Type: application/json'
);
// Open connection
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt( $ch, CURLOPT_URL, $url );
curl_setopt( $ch, CURLOPT_POST, true );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );

// Execute post
$result = curl_exec($ch);

// Close connection
curl_close($ch);
// Echo success or failure
echo $result;
?>

我的手机从来没有收到任何推送通知。事情是，实际上我从来没有得到任何输出从脚本像echo $result;返回什么。

这可能吗?

任何想法?

<?php
// Replace with real BROWSER API key from Google APIs
$apiKey = "AIzaSyAATjQOVDdOUiHra0H-EfxpobQcqOsdwqa";
// Replace with real client registration IDs. Put the correct registration id you are getting from app. If you are using eclipse check your logcat you will get it there.
$registrationIDs = array("APA91bEmxWS9bsXLsixaYQ6zuByM0SzFWe5DEKVLO68923hW3Mo2qB6bIH2LarP5WgzKasMtFAdVyy8YQuwv0YbrRNwdGFORh1wQvQ9uKBkC3jH6uXBYAQOv5xfzrsjYjqcQK8syikrQ6dq6oRrp9XUnimdj_4oBbw" );
// Message to be sent
$message = "Push working!";

// Set POST variables.
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
        'registration_ids'  => $registrationIDs,
        'data'              => array( "message" => $message ) /*Make sure that message is the key you are using in GCMIntentService.java onMessage() ->  extras.getString("message");*/
);
$headers = array(
        'Authorization: key=' . $apiKey,
        'Content-Type: application/json'
);
// Open connection
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt( $ch, CURLOPT_URL, $url );
curl_setopt( $ch, CURLOPT_POST, true );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );

// Execute post
$result = curl_exec($ch);

// Close connection
curl_close($ch);
// Echo success or failure
echo $result;
?>