I'm trying to get a screenshot of my visitors!
Normally its working with imagegrabscreen
but I got a Linux Server.
<?php
$im = imagegrabscreen();
imagepng($im, "myscreenshot.png");
imagedestroy($im);
?>
I get this error:
Fatal error: Call to undefined function imagegrabscreen() in /var/www/index.php on line 2
How can I fixed that on Linux?
Or is there a other possible way to do that?