来自Proxy Server的cURL内容？

i want to get content via a proxy i tried the following code but i dont get the content of proxy ! i get value of redirect but after that i cant echo its content! could any one tell me how to fix it?Thanks in advance.

<?php

//create array of data to be posted
$post_data['u'] = 'http://api.somesite.com/get?apikey=w3ijwiefjdigashdufhsaiufs34r4';
$post_data['encodeURL'] = 'on';
$post_data['allowCookies'] = 'on';
$post_data['stripJS'] = 'on';
$post_data['stripObjects'] = 'on';
//u'

//traverse array and prepare data for posting (key1=value1)
foreach ( $post_data as $key => $value) {
    $post_items[] = $key . '=' . $value;
}

//create the final string to be posted using implode()
$post_string = implode ('&', $post_items);

//create cURL connection
$curl_connection =
  curl_init('http://zend2.com/includes/process.php?action=update');

//set options
curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 30);



curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);

curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 1);

//i added these two lines
curl_setopt($curl,CURLOPT_FOLLOWLOCATION,TRUE);
curl_setopt($curl,CURLOPT_MAXREDIRS,2);//only 2 redirects

//set data to be posted
curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);

//perform our request
$result = curl_exec($curl_connection);


//show information regarding the request
print_r(curl_getinfo($curl_connection));
echo curl_errno($curl_connection) . '-' .
                curl_error($curl_connection);

$info = curl_getinfo($curl_connection); 
$url2 = $info['redirect_url'];
echo "redirect_url:".$url2;

echo result;

you need to set the CURLOPT_PROXY to go through a proxy. refer curl documentation for above value.