get.php

<?php

$orig = file_get_contents("state.txt");

if ( array_key_exists("instant",$_REQUEST) ) {
  die($orig);
}

while ( 1 )
{
	$new = file_get_contents("state.txt");

    if ( $new != $orig )
    {
        echo($new);
		break;
    }

    sleep(2);
}