PHP - CURL POST

CURL POST
   $post_data_arr = [
      'f_name' => 'First',
      'l_name' => 'Last',
    ]; 
    
    $url = 'http://example.com';
    $curl = curl_init($url);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $post_data_arr);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    $response = curl_exec($curl);
    curl_close($curl);
    print_r($response);
 
CURL POST with authentication 

    $url = 'http://example.com';
    $username = "username";
    $password = "password"; 

    $curl = curl_init($url);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 2);
    curl_setopt($curl, CURLOPT_USERPWD, "$username:$password");
    curl_setopt($curl, CURLOPT_POSTFIELDS, $post_data_arr);
    
    $response = curl_exec($curl);
    curl_close($curl); 
    print_r($response);