Re: Check whether a page is Google Cached

On Tue, Apr 21, 2009 at 8:29 AM, Alan Chen <ccw@datanumen.com> wrote: > Hi, everyone, > > I want to write a small PHP script test.php that can determine whether a > webpage is Google Cached. > > Assuming it is uploaded to www.mysite.com, and I want to use it to check > whether www.yoursite.com is google cached. > > It works as follows: > > The user input the query: > > http://www.mysite.com/test.php?site=www.yoursite.com > > The php script will send the following request to the browser > > http://www.google.com/search?q=cache:www.yoursite.com > > in the background. > > And if the returned result contains a string "This is Google's cache of", > then the page is cached, so the php script can display > > "Your site is cached by Google" > > otherwise, it will say > > "Your site is not cached by Google" > > Just wonder how to implement such a feature, can anyone write a simple > sample so that I can use as a startpoint as I am a totally new guy in PHP > coding You've already laid out most of what needs to be done. I think the file_get_contents() function will be your best friend here, provided allow_url_fopen has been set to TRUE in your PHP configuration. Take the result you get back from that function and parse the 2nd line for ">This is Google&#39;s cache of <" (I have made this assumption by looking at the source of http://www.google.com/search?q=cache:www.php.net). example.php === <?php $url = $_GET['url']; $res = file_get_contents('http://www.google.com/search?q=cache:' . $url); if($res && strstr('>This is Google&#39;s cache of <', $res)) echo 'Your page is cached.'; else echo 'Your page is not cached.'; ?> UNTESTED. Hope this helps. -- // Todd