// open a http channel, transmit data and return received buffer
function xml_post($post_xml, $url, $port)
{
$user_agent = $_SERVER[’HTTP_USER_AGENT’];
$ch = curl_init(); // initialize curl handle
curl_setopt($ch, CURLOPT_URL, $url); // set url to post to
curl_setopt($ch, CURLOPT_FAILONERROR, 1); // Fail on errors
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); // allow redirects
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); // return into a variable
curl_setopt($ch, CURLOPT_PORT, $port); //Set the port number
curl_setopt($ch, CURLOPT_TIMEOUT, 15); // times out after 15s
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_xml); // add POST fields
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
if($port==443)
{
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
}
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
The example below shows how the function works, by posting a XML document of the form
<?xml version=”1.0″ encoding=”iso-8859-1″?>
<Document>
<Message>
Your Name
</Message>
</Document>
to a “listener” script, which takes the XML document and returns a reply (another XML document). In this case, the listener is very simple. All it does is replace the “Message” tag with “Reply” and print the resulting XML. Of course, the listener can do all sorts of things in response to the POST.
<?php
if ( !isset( $HTTP_RAW_POST_DATA ) )
{
$HTTP_RAW_POST_DATA = file_get_contents( ‘php://input’ );
}
$xml = str_replace(”Message”,”Reply” , $HTTP_RAW_POST_DATA);
print((trim($xml)));
?>
You can download the function code, as well as a working example here. Let me know what you think.
