PHP cURL

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cURL stands for Client URL. The cURL extension in PHP provides functionality for your scripts to initiate HTTP requests with external servers and APIs such as RESTful services and form submissions. ).

 

 

  • Initialize: curl_init()
  • Set options: curl_setopt()
  • Execute request: curl_exec()
  • Close session: curl_close()
php-curl

GET Request

<?php
$ch = curl_init("https://api.example.com/data");

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // Return response instead of output
$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>

POST Request

<?php
$data = ["name" => "Alice", "email" => "alice@example.com"];
$jsonData = json_encode($data);

$ch = curl_init("https://api.example.com/users");

curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Content-Length: ' . strlen($jsonData)
]);

$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>

PUT Request

<?php
$data = ["name" => "Updated Name"];
$jsonData = json_encode($data);

$ch = curl_init("https://api.example.com/users/1");

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Content-Length: ' . strlen($jsonData)
]);

$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>

DELETE Request

<?php
$ch = curl_init("https://api.example.com/users/1");

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "DELETE");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>

Useful cURL

Option Purpose
CURLOPT_URL Set the request URL
CURLOPT_RETURNTRANSFER Return response as string
CURLOPT_POST Perform HTTP POST
CURLOPT_CUSTOMREQUEST Use PUT, DELETE, etc.
CURLOPT_HTTPHEADER Set custom headers
CURLOPT_POSTFIELDS Send request body
CURLOPT_TIMEOUT Set timeout in seconds
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