Php curl accept application json

How To POST JSON Data with PHP cURL

When working with APIs, it’s common to send and receive data in JSON format. In PHP, you can use the cURL library to send HTTP requests, including sending JSON data in a POST request. In this article, we’ll show you how to POST JSON data with PHP cURL in a step-by-step guide.

Step 1: Set the URL and JSON data

The first step is to set the URL that you want to send the request to and the JSON data that you want to send in the request body. For this example, we’ll use a sample JSON data:

In this example, we’ve created an array of data and encoded it into a JSON string using the json_encode() function.

Step 2: Set the cURL options

The next step is to set the cURL options for the request, including the URL, request method, and request body. Here’s an example of how to set the cURL options:

In this example, we’ve set the following options:

• CURLOPT_RETURNTRANSFER: Set to true to return the response as a string instead of outputting it directly to the screen.
• CURLOPT_CUSTOMREQUEST: Set to “POST” to specify that we’re sending a POST request.
• CURLOPT_POSTFIELDS: Set to the JSON data that we want to send in the request body.
• CURLOPT_HTTPHEADER: Set to an array of headers, including the Content-Type header to specify that we’re sending JSON data, and the Content-Length header to specify the length of the JSON data.

Step 3: Send the request and handle the response

The final step is to send the request using the curl_exec() function and handle the response. Here’s an example of how to do this:

In this example, we’ve used the curl_exec() function to send the request and store the response in the $response variable. We’ve also checked for any errors using the curl_errno() function and displayed the error message if there was an error. Finally, we’ve closed the cURL handle using the curl_close() function.

Step 4: Complete PHP Script

After combining the above code, you will get a full functional PHP script that can POST JSON data to remote APIs.

Save the file content and run this via the PHP command line interface.

Conclusion

In this article, we’ve shown you how to POST JSON data with PHP cURL in a step-by-step guide. By setting the URL and JSON data, setting the cURL options, and sending the request, and handling the response, you can easily send JSON data in a POST request using PHP cURL.

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13 Comments

## Hello everyone, I have a problem I am developing a data submission using the following code i get a:
Error: Failed to connect to 54.193.100.127 port 5175 after 0 ms: Couldn’t connect to server ‘100000000000001’,
‘lattitude’ => ‘17.983601’,
‘longitude’ => ‘-102.357148’,
‘speed’ => ‘0’,
‘angle’ => ‘0’,
‘satellite’ => ‘8’,
‘time’ => ‘2023-06-07 05:56:00’,
‘battery_voltage’ => ’20’,
‘gps_validity’ => ‘A’
); $json = json_encode($datos);
echo $json; echo “”;
echo strlen($json); echo “”; //$url = ‘http://54.193.100.127:5175’; //add curlopt_port
$url = ‘http://54.193.100.127’;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_PORT, 5175);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, “POST”);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
‘Content-Type: application/json’,
‘Content-Length: ‘ . strlen($json)
));
curl_setopt($ch, CURLOPT_POSTFIELDS, $json); $response = curl_exec($ch);
if(curl_errno($ch)) echo ‘Error: ‘ . curl_error($ch);
> else echo ‘Respuesta: ‘; echo $response;
> ?> // But when I use the terminal with the curl command as follows:
curl -X POST -d ‘’ -H “Content-Type: application/json” http://54.193.100.127:5175 //The server responds
Can you help me?

The main thing is that the request must be a POST request with properly json-encoded data in the body. The headers must properly describe the post body.

Is there a way to avoid the auto “Content-Type: application/x-www-form-urlencoded
” when using POST, I mean, I’m using the following code:
//—————————————————————————————————-
$ch = curl_init();
if(!empty($gdxParams))
$curlUrl=$curlUrl.’?’.$gdxParams;
>
$curlOptions=array();
if($gdxMethod==”POST”)
$curlOptions=[
CURLOPT_HTTPHEADER=>[
‘x-api-key: ‘.$gdxApiKey,
‘Authorization: Bearer ‘.$gdxApiKey,
‘Content-Type​: ​application/json’,
],
CURLOPT_URL=>$curlUrl,
CURLOPT_CUSTOMREQUEST=>’POST’,
CURLOPT_POSTFIELDS=>json_encode($gdxArrayParams),
CURLOPT_RETURNTRANSFER=>true,
CURLINFO_HEADER_OUT=>true,
];
>
else//Method GET
$curlOptions=[
CURLOPT_HTTPHEADER=>[
‘x-api-key: ‘.$gdxApiKey,
‘Authorization: Bearer ‘.$gdxApiKey,
],
CURLOPT_URL=>$curlUrl,
CURLOPT_CUSTOMREQUEST=>’GET’,
CURLOPT_RETURNTRANSFER=>true,
CURLINFO_HEADER_OUT=>true,
];
>
curl_setopt_array($ch, $curlOptions);
$response = curl_exec($ch);
/*—*/
$arrayInfo=array();
$arrayInfo[‘header_info’]=curl_getinfo($ch, CURLINFO_HEADER_OUT);
$arrayInfo[‘response’]=$response;
var_dump($arrayInfo);
/*—*/
//————————————————————————————————
But the header info always gets set as:
//—————————————————————————————————————
‘header_info’ => string ‘POST /v1/reservations?tripId=XXXXXXXXXXXXXXXXXX&lang=es&verifyDuplicatedReservations=true HTTP/1.1 Host: stage.ws.gdx.travel Accept: */* x-api-key: XXXXXXXXXXXXXXXXXXXXXX Authorization: Bearer XXXXXXXXXXXXXXXXXXXXXX Content-Type​: ​application/json Content-Length: 221 Content-Type: application/x-www-form-urlencoded
//——————————————————————————————————
If I remove the CURLOPT_POSTFIELDS option, the headers only gets one “Content-Type” line (application/json, the one that I need)
Any clues?

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
‘Content-Type: application/json’,
‘Content-Length: ‘ . strlen($payload))
); You are asking for strlen($payload); which is the string-length while $payload is an array, so that gives an error? Any advise?

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How to POST and Receive JSON Data using cURL in PHP

In this article you will learn about how to create web services APIs using PHP. Iif you are working with web services, you need to know about how we can POST and Receive JSON Data using cURL in PHP. Sending and Receiving JSON data via POST Request is most important functionality in PHP. It’s make easy to POST JSON data to APIs url and receive response in JSON data format. So, Today we will learn about “How to POST and Receive JSON Data using cURL in PHP”.

Let’s Start to send JSON data via POSt Request with PHP cURL:

In the following example code, i will show you HTTP POST request and send JSON data to URL with cURL function.

Step-1: First we will specify URL ($url) where the JSON data need to be send.
Step-2: Initiate cURL resource using curl_init().
step-3: encode PHP array data into aJSON string using json_encode().
step-4: Attach JSON data to the POSt field using the CURLOPT_POSTFIELDS option.
step-5: set header option to Content-Type: application/json
step-6: Return response as string CURL_RETURNTRANSFER option
Step-7: Finally curl_exec() function is used to execute the POST request api url.

index.php

In the following example code, We will pass POST data on API URL as JSON format.

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