online.php

一个很漂亮的相册系统

<?
	require "config.php";
	$ip = $_SERVER['REMOTE_ADDR'];
	$time = time();
	$cutoff = 15; 
	$exists = 0;
	$users = 0;
	$user  = "";
	$fp = fopen ("online.txt","r+"); 
		while (!feof($fp))
		{
		$user[] = chop(fgets($fp,65536));
		}
		fseek($fp,0,SEEK_SET);

		foreach ($user as $line)
		{
		list($oldip,$oldtime) = explode('|',$line);
		if ($oldip == $ip) {$oldtime = $time;$exists = 1;} 
		if ($time < $oldtime + ($cutoff * 60)) 
		{
		fputs($fp,"$oldip|$oldtime\n"); 
		$users = $users + 1; 
		}
		}
		if ($exists == 0) 
		{
		fputs($fp,"$ip|$time\n"); 
		$users = $users + 1; 
		}
		fclose ($fp); 
		print "$users"; 

?>