Send Ping to Yahoo! when RSS Feed is Updated

How to ping Yahoo! when an RSS feed has been updated, using the REST interface.

Download Chilkat HTTP ActiveX

<?php

$http = new COM("Chilkat.Http");

//  Any string unlocks the component for the 1st 30-days.
$success = $http->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print $http->lastErrorText() . "\n";
    exit;
}

//  Yahoo indicates that The REST interface:
//  URL: http://ping.feeds.yahoo.com/rss/ping
//  Parameter(s): u=<site or feed url>
//  HTTP method: GET

//  The RSS2 feed URL for blog.chilkatsoft.com is:
//  http://blog.chilkatsoft.com/?feed=rss2

//  Send the HTTP GET and return the content in a string.

$responseText = $http->quickGetStr('http://ping.feeds.yahoo.com/rss/ping?u=http://blog.chilkatsoft.com/?feed=rss2');

print $responseText . "\n";
?>