Building a URL with JSON data as a query string parameter value

Question

I have this data

$data = array('username' => 'myname',
              'password' => 'mypass'
           );
$json = json_encode($data);

How can i pass the json as a variable to a url that looks like this

'http://example.com/login/?data='

this is what i have tried and get '400: data not passed' error

$data = array('username' => 'myname',
          'password' => 'mypass'
       );

$data_string = json_encode($data);
$curl = curl_init();
curl_setopt($curl, CURLOPT_POST, TRUE);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($curl, CURLOPT_URL, 'http://example.com/login/?data='); //also 'http://example.com/login/'
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
            'Content-Type: application/json',
            'Accept: application/json',
            'Content-Length: ' . strlen($data_string)
        ));
curl_setopt($curl, CURLOPT_HEADER, TRUE);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);

// Exec
$response = curl_exec($curl);
$info = curl_getinfo($curl);
curl_close($curl);

Brad · Accepted Answer · 2016-07-17 21:36:19Z

3

Any data used in the query string should be URL-encoded.

$url = 'http://example.com/login/' . http_build_query([
    'data' => json_encode([
        'username' => 'myname',
        'password' => 'mypass'
    ])
]);

http_build_query() will take an associative array of parameters, and apply all the proper encodings, building the whole query string for you.

The URL returned:

http://example.com/login/data=%7B%22username%22%3A%22myname%22%2C%22password%22%3A%22mypass%22%7D

answered Jul 17, 2016 at 21:36

Brad

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8 Comments

Brad Over a year ago

@Marth Well, you don't need POST, since you've put all the data in the URL, but here: php.net/manual/en/curl.examples.php#88055 If you actually wanted to POST the data, don't include it in the URL... just send the JSON as the POST body. Much easier to deal with, and then you don't run into any arbitrary length restrictions.

Marth Over a year ago

how can i see the status like (400,200 ...) ?

Brad Over a year ago

@Marth curl_getinfo($ch, CURLINFO_HTTP_CODE) php.net/manual/en/function.curl-getinfo.php

Brad Over a year ago

@Marth I don't know what you're asking at this point. You originally indicated you wanted the data in the URL. Do you want it in the URL or do you want to send it as the POST body? You're sort of doing both, and we don't know what the server side expects so you'll have to determine that.

Marth Over a year ago

i want to post the data and get response

|

Charles Bryant · Accepted Answer · 2016-07-17 21:36:55Z

0

This is possible to do this, you are pretty much there.

$data = array('username' => 'myname',
              'password' => 'mypass'
           );
$json = json_encode($data);

$url = 'http://example.com/login/?data=' . urlencode($json);

This will be a safe url that can do what ever you want with it.

answered Jul 17, 2016 at 21:36

Charles Bryant

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