<?php | |
$device_memory = $_SERVER["HTTP_DEVICE_MEMORY"]; | |
if(isset($device_memory) && $device_memory != 0 | |
&& ($device_memory & ($device_memory - 1)) == 0) { | |
$fn = fopen("compass.jpg", "r"); | |
fpassthru($fn); | |
fclose($fn); | |
exit; | |
} | |
header("HTTP/1.1 417 Expectation failed"); | |
?> |