php curl post and write to file

php-curl-post.php

$ch = curl_init($post_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array('data1'=>'val','data2'=>'val2')));
$data_str = curl_exec($ch);
curl_close($ch);
file_put_contents($path_to_xml_data,$data_str);