Facebook API Question posted in
The official documentation for the Facebook APIs can be found here.

How Do You POST JSON Data In PHP? (Convert Raw cURL Code Into PHP)

I am working with Facebook’s API, and I’m trying to conduct a cURL request in PHP.

This request is a POST request and passes some JSON data.

I want this JSON data to be an array within PHP, then pass this into the cURL request.

Here is an example cURL request from FB’s documentation.

curl -X POST 
  -F 'data=[
       {
         "event_name": "PageView",
         "event_time": 1610378833,
         "user_data": {
           "fbc": "fb.1.1554763741205.AbCdEfGhIjKlMnOpQrStUvWxYz1234567890",
           "fbp": "fb.1.1558571054389.1098115397",
           "em": "309a0a5c3e211326ae75ca18196d301a9bdbd1a882a4d2569511033da23f0abd"
         }
       }
     ]' 
  -F 'access_token=<ACCESS_TOKEN>' 
  https://graph.facebook.com/v9.0/<PIXEL_ID>/events

I have tried multiple attempts in PHP, but my array doesn’t seem to be parsed correctly.

Here is my PHP Code:

$data = array("data" => array("event_name" => "Purchase", "event_time" => time()),

        "access_token" => "EAADZAQ7wNP3UBAMjOcHJV1dvgRYPoyarnLPO5Rr6cwRiOuF0biRTZCJWbCn000U9SD8hovXoKZB0zg1H8PoTI3d4RuvUZC1VQshieXSPcZABiCwqi1rgzzaYZBfMkD6qgAZBKikCtG3jO9SYWanuPUvctypbyoxQm4zVI5Cq8K"

);          

$dataString = json_encode($data);                                         
                                                                                                                    
$ch = curl_init('https://graph.facebook.com/v9.0/229975271636842/events');                                                                      
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");                                                                     
curl_setopt($ch, CURLOPT_POSTFIELDS, $dataString);                                                                  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);                                                                      
curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                          
    'Content-Type: application/json',                                                                                
    'Content-Length: ' . strlen($dataString))                                                                       
);                                                                                                                                                                       
echo $result = curl_exec($ch);

Here is the error:

{"error":{"message":"(#100) param data must be an array.","type":"OAuthException","code":100,"fbtrace_id":"ACWsWbLVtlLZdbMyty_9VKA"}}

Here is Facebook’s Documentation.

I would appreciate any help. Thank you.

Tags:

3

Answers


  1. 0

    As the error says, you don’t need to json_encode the data.

    $curl = curl_init();

$array = [
    "data" => [[
        "event_name"=> "PageView",
        "event_time"=> 1610378833,
        "user_data" => [
            "fbc" => "fb.1.1554763741205.AbCdEfGhIjKlMnOpQrStUvWxYz1234567890",
            "fbp" => "fb.1.1558571054389.1098115397",
            "em" => "309a0a5c3e211326ae75ca18196d301a9bdbd1a882a4d2569511033da23f0abd"
        ]
    ]]
];

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://graph.facebook.com/v9.0/229975271636842/events',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS => json_encode($array),
  CURLOPT_HTTPHEADER => array(
    'Content-Type: application/json'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;
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  2. 0 
    $array = [
        "event_name"=> "PageView", 
        "event_name2"=> "PageView2",
        // and so on ...
];
$object = json_decode(json_encode($array) );

$data = ['data'=> $object];

    and then pass it to your curl function.

    For Nico. Right. I forgort explanation: I think:

    -F 'data=[
       {

    means Object inside array. And the FB Error Response tell us: "error":{"message":"(#100) param data must be an array. And Jack encode the whole data to a datastring.

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  3. 0

    I think that the problem is that an array is missing. The "data" field is an array with an object inside.
    Try this:

    $data = array( // main object
    "data" => array( // data array
        array("event_name" => "Purchase", "event_time" => time()), // single data array entry
    ),
    "access_token" => "..."
);
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