如何在 PHP 中的 cURL 中发送 JSON 数据

Question

I have rest API of Nodejs Server, I'm trying to make a POST call to it using PHP.

My php code is:

function post_url($apiRoute,$data) {
    $request_url = 'http://test-app.herokuapp.com';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $request_url . $apiRoute);
    curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));
    curl_setopt($ch, CURLOPT_POST, 1);
    echo $data ;
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

    //curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($ch);
    curl_close($ch);
    return $result;
}

I have tried calling this function with diff forms of data:

$g = array("_id" => "111");
$postapiresponse = post_url('/CCTRequest/get',json_encode($g));

OR

$postapiresponse = post_url('/CCTRequest/get',json_encode(array("_id" => "111"));

But on server side which Node.js, when I console log req.body I get data like this:

{ '{"_id":"111"}': '' }

How should I pass the data in PHP so I can get proper obj in node.js ie:

{ '_id': '111' }

Answer 1

See the PHP document: http://php.net/manual/en/function.curl-setopt.php

CURLOPT_POST :

TRUE to do a regular HTTP POST. This POST is the normal application/x-www-form-urlencoded kind, most commonly used by HTML forms.

CURLOPT_POSTFIELDS :

If value is an array, the Content-Type header will be set to multipart/form-data .

So you can pass a query string returned by http_build_query() into CURLOPT_POSTFIELDS :

post_url('/CCTRequest/get', http_build_query($g, null, '&'));

and remove curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type:application/json')); . (In fact, the varieble should be $ch , but you typed $curl , so this line doesn't work.)

In the other way, you can replace curl_setopt($ch, CURLOPT_POST, 1); with curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST'); , it can prevent the data be encoded automaticlly. And then send json_encode() data.

Answer 2

You have a typo in the code, which will prevent it setting the header $curl should be $ch :

curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));

You also need CURLOPT_RETURNTRANSFER uncommented.

function post_url($apiRoute, $data) {
    $request_url = 'www.example.com';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $request_url . $apiRoute);
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type:application/json']);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($ch);
    curl_close($ch);

    return $result;
}

Answer 3

I have solved by using http_build_query($g, null, '&') for making data.

 $g = array("_id" => "111");
$g = http_build_query($g, null, '&');
$postapiresponse = post_url('/CCTRequest/get', $g);