(PHP 5 >= 5.2.2)
imagegrabscreen — Captures the whole screen
Grabs a screenshot of the whole screen.
Returns an image resource identifier on success, FALSE on failure.
Example #1 imagegrabscreen() example
This example demonstrates how to take a screenshot of the current screen and save it as a png image.
<?php
$im = imagegrabscreen();
imagepng($im, "myscreenshot.png");
imagedestroy($im);
?>
Note: This function is only available on Windows.