Saving a curl response into a php variable

Here is example to save a curl resonse into a variable in php

<?php  
//URL of targeted site  
$url = "http://www.putyourapihere.com/";  
$ch = curl_init();  

// set URL and other appropriate options  
curl_setopt($ch, CURLOPT_URL, $url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  

// grab URL and pass it to the browser  

$output = curl_exec($ch);  

//echo $output;

// close curl resource, and free up system resources  
curl_close($ch);  
?>  

The $output variable contains the response.