Connection_Aborted

<?php
error_reporting(E_ALL);
Set_Time_Limit(0);  //this you know what gonna do
Ignore_User_Abort(true); //this will force the script running at the end
echo 'test';
sleep(2);
flush(); //Now php will check de connection
writeCache();
echo 'test2';
sleep(2);
flush(); //Now php will check de connection
writeCache();
function writeCache(){
	$stat=Connection_Aborted();
	switch ($stat) {
		case CONNECTION_NORMAL:
			$str="NORMAL";
			break;
		case CONNECTION_ABORTED:
			$str="ABORTED";
			break;
		default:
			$str="UNKOWN";;
			break;
	}
	$fh=fopen('cache.txt','at');
	fwrite($fh,$str."\n");
	fclose($fh);
}
?>

1.Set_Time_Limit(0) 取消script 运行时间限制
2.Ignore_User_Abort(true),deault is false,当php get client is aborted,script will stop executing
3.flush  php will check client connection state
4.In window NT ,firefox environment,php get correct connectiong state ,until flush twice