PHP CURL Sample

function send_post_request($url, $data = array()) {
    // Initialize cURL session
    $curl = curl_init();
    
    // Set the URL to send the POST request to
    curl_setopt($curl, CURLOPT_URL, $url);
    
    // Set the request method to POST
    curl_setopt($curl, CURLOPT_POST, true);
    
    // Set the POST data
    if (!empty($data)) {
        curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($data));
    }
    
    // Set cURL options to include response headers in the output
    curl_setopt($curl, CURLOPT_HEADER, false);
    
    // Set cURL option to return the response as a string
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    
    // Execute cURL session and store the response
    $response = curl_exec($curl);
    
    // Check for errors
    if($response === false) {
        // If there was an error, return the error message
        $error_message = curl_error($curl);
        curl_close($curl);
        return "cURL Error: " . $error_message;
    }
    
    // Close cURL session
    curl_close($curl);
    
    // Return the response
    return $response;
}

// Example usage:
$url = "https://example.com/api";
$data = array(
    'key1' => 'value1',
    'key2' => 'value2'
);

$response = send_post_request($url, $data);
echo $response;