How Can I Use cURL in PHP to Make HTTP POST Requests?

POSTing with cURL in PHP

In PHP, cURL can be leveraged for HTTP POST requests, allowing you to send data to a remote server.

Example:

Suppose you want to send the following data to www.example.com:

username=user1, password=passuser1, gender=1

And expect a "result=OK" response. Here's how to implement it:

$ch = curl_init();

// Set the POST URL
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/tester.phtml");

// Enable POST and set POST fields
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(['postvar1' => 'value1']));

// Receive the response and store it in a variable
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$server_output = curl_exec($ch);

// Close the cURL connection
curl_close($ch);

// Process the response (e.g., check if the result is "OK")
if ($server_output == "OK") {
  // Perform actions if the response matches the expected result
} else {
  // Handle cases where the result is different
}

This script initializes a cURL session ($ch), specifies the POST URL, enables POST, sets the POST data, and captures the server's response. If the response matches the expected "OK" result, specific actions can be performed accordingly.

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