将file_get_contents用于循环中的不同URL似乎会破坏其余的代码

I am currently trying to fetch some facebook data, which I then want to access in Javascript. Specifically, I am trying to access some characteristics of the user's friends. So I am getting the user's friend list using file_get_contents to his graph API URL. This provides me with an array of friend ids.

As I need a characteristic from each friend, I am doing:

foreach($dataarray as $friend) {
$friendurl = "https://graph.facebook.com/".$friend->id."?access_token=".$token."";
$fdata = json_decode(file_get_contents($friendurl));
if($fdata->gender == "male") {
 array_push($fulldata, $fdata->name);
    }
}

Having this code piece seems to break the javascript code, as none of my alert instructions are ran.

Also, inserting a break after the if, so that only one file_get_contents is done, seems to make the code runnable (but I obviously need to go through all of the friends).

How can I solve this?

I would use jQuery or xmlHttpRequest to do the HTTP GET, but somehow I always seem to get back a status code of 0, with an empty response.

Edit: Here is the JS code:

<script type="text/javascript">
        function initialize() {

                alert('Test1');
                <?php

                $fulldata = array();

                $data = $result->data;

                foreach($data as $friend) {
                    $friendurl = "https://graph.facebook.com/".$friend->id."?access_token=".$token."";
                    //echo("alert(\"".$friendurl."\");");
                    $fdata = json_decode(file_get_contents($friendurl));
                    if($fdata->hometown->name) {
                        array_push($fulldata, $fdata->hometown->name);
                    }
                }
                echo ("alert(\"".count($fulldata)."\")");
                ?>

                }
         </script>

I should've also added that this is being done on a page embedded into facebook using the canvas feature.

Try...

function curl($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    return curl_exec($ch);
    curl_close ($ch);
}

foreach($dataarray as $friend){
    $friendurl = "https://graph.facebook.com/".$friend->id."?access_token=".$token."";
    $fdata = json_decode(curl($friendurl));
    if($fdata->gender == "male"){
            array_push($fulldata, $fdata->name);
        }
}

Maybe FGC is disabled but you don't get any notifications/warnings.

Code from comment:

error_reporting(E_ALL); ini_set("display_errors", 1);

Note that you are doing cross-domain AJAX call which is prohibited for security reasons. You can do the api call on the server and echo the data to the client side JS, or you can build a php proxy return the result of the Graph API call(As the proxy is at your own server, they are in the same domain).