I am testing some code that gets the content of Google Base page:
$googleDetailContent=file_get_contents("http://www.google.com/base/a/1372710/D17473680841346550802");
Going through the browser, the above url displays a Buy button, along with pricing information. But when I echo $googleDetailContent, Buy button html is not part of the string.
How is Google blocking certain elements from file_get_contents?