PHP ajax聊天室 无刷先聊天室

<?php //****************参数设置**************** //显示在线用户 $disonline = true; //新登陆时显示最近内容的条数(默认为30条) $leastnum = 30; //默认的房间名(默认是每天换一个文件)，如果去掉d，则是每月换一个文件 $room = date("Y-m-d"); //房间保存路径,必须以/结尾 $roomdir = "rooms/"; //编码方式 $charset = "UTF-8"; //客户端最大显示内容条数(建议不要太大) $maxdisplay = 500; //语言 $lang = array( //聊天室描述 "description"=>"欢迎来到迷你聊天室。<a href='http://www.esushe.com' target=_blank>进入</a>", //聊天室标题 "title"=>"校内圈 迷你聊天室 每日清空", //第一个到聊天室的欢迎 "firstone"=>"<span style='color:#16a5e9;'>Welcome to 校内圈 迷你聊天室!</span>", //当信息有禁止内容时显示 "ban"=>"I am a pig!", //关键字 "keywords"=>"聊天室,迷你,小型,AJAX,Chat,Chatroom,Longbill,Longbill.cn,PHP,Javascript", //发言提示 "hereyourwords" => "在这里发言!" ); header("content-type:text/html; charset=utf-8"); $get_past_sec = 3; //如果发现丢话，可以适当调大这个值 $touchs = 10; //检查在线人数的时间间隔 $title = $lang["title"]; $earlier = 10; $description = $lang["description"]; $origroom = $room; $least = ($_GET["dis"])?intval($_GET["dis"]):$leastnum; $touchme = $_POST['touchme']; if (!is_dir($roomdir)) @mkdir($roomdir) or die("error when creating folder $roomdir"); $room = $_GET['room']; if (!$room) $room = $_POST["room"]; $room = checkfilename($room); if (!$room) $room = $origroom; $filename = $roomdir.$room.".dat.php"; $datafile = $roomdir.$room.".php"; if (!file_exists($filename)) @file_put_contents($filename,'<?php die();?>'."\n".time()."|".$lang["firstone"]."\n"); if (!file_exists($datafile)) @file_put_contents($datafile,'<?php die();?>'."\n"); $action = $_POST["action"]; if (!function_exists("file_get_contents")) { function file_get_contents($path) { if (!file_exists($path)) return false; $fp=@fopen($path,"r"); $all=fread($fp,filesize($path)); fclose($fp); return $all; } } if (!function_exists("file_put_contents")) { function file_put_contents($path,$val) { $fp=@fopen($path,"w"); fputs($fp,$val); fclose($fp); return true; } } function checkfilename($file) { if (!$file) return ""; $file = trim($file); $a = substr($file,-1); $file = eregi_replace("^[.\\\/]*","",$file); $file = eregi_replace("[.\\\/]*$","",$file); $arr = array("../","./","/","\\","..\\",".\\"); $file = str_replace($arr,"",$file); return $file; } function get_ip() { global $_SERVER; if ($_SERVER) { if ( $_SERVER[HTTP_X_FORWARDED_FOR] ) $realip = $_SERVER["HTTP_X_FORWARDED_FOR"]; else if ( $_SERVER["HTTP_CLIENT_ip"] ) $realip = $_SERVER["HTTP_CLIENT_ip"]; else $realip = $_SERVER["REMOTE_ADDR"]; } else { if ( getenv( 'HTTP_X_FORWARDED_FOR' ) ) $realip = getenv( 'HTTP_X_FORWARDED_FOR' ); else if ( getenv( 'HTTP_CLIENT_ip' ) ) $realip = getenv( 'HTTP_CLIENT_ip' ); else $realip = getenv( 'REMOTE_ADDR' ); } return $realip; } function array2json($arr) { $keys = array_keys($arr); $isarr = true; $json = ""; for($i=0;$i<count($keys);$i++) { if ($keys[$i] !== $i) { $isarr = false; break; } } $json = $space; $json.= ($isarr)?"[":"{"; for($i=0;$i<count($keys);$i++) { if ($i!=0) $json.= ","; $item = $arr[$keys[$i]]; $json.=($isarr)?"":$keys[$i].':'; if (is_array($item)) $json.=array2json($item); else if (is_string($item)) $json.='"'.str_replace(array("\r","\n"),"",$item).'"'; else $json.=$item; } $json.= ($isarr)?"]":"}"; return $json; } function keeponline() { global $disonline,$datafile; if (!$disonline) return; $name = $_POST['name']; $ip = get_ip(); $onlines = @file_get_contents($datafile); $s1 = "|{$name}|{$ip}|"; if (strpos($onlines,$s1) === false) { if (strpos($onlines,"|".$name."|") === false) { $fp = @fopen($datafile,"a+"); if ($fp) { if (@flock($fp, LOCK_EX)) { @fputs($fp,time()."|".time().$s1."\n"); @flock($fp, LOCK_UN); } @fclose($fp); } } else { echo "NAME"; die(); } } } if ($action == "write") { $color = $_POST["color"]; if (!eregi("[0-9a-fA-F]{6}",$color) || $color == "#000000") $color = ""; $color = "#".$color; $size = intval($_POST["size"]); $name = str_replace(array("\n","\r"),"",$_POST['name']); if (!$name) die("No Name!!"); $ip = get_ip(); keeponline(); $s = ""; $style = ""; $font = $_POST["font"]; if ($font == "songti") $font = "宋体"; else if ($font == "heiti") $font = "黑体"; else if ($font == "kaiti") $font = "楷体_GB2312"; else $font = ""; $style .= (!$font)?"":"font-family:".$font.";"; $style .= (!$_POST["bold"])?"":"font-weight:bold;"; $style .= (!$color || $color == "#")?"":"color:{$color};"; $style .= (!$size || $size == "16")?"":"font-size:{$size}px;"; $t = time(); $arr = explode("\n",$_POST['content']); for($i = 0;$i<count($arr);$i++) { $content = $arr[$i]; $content = trim($content); $content = str_replace(array("\n","\r"),"",$content); if (!$content) continue; $content = htmlspecialchars($content); $content = preg_replace("~\[img\](http:\/\/[a-zA-Z0-9\.-_\+%\?]*)\[\/img\]~i", "<img src='$1' />", $content); $content = ($style)?"<span style='{$style}'>{$content}</span>":$content; $s.= $t."|".$name.":".$content."\n"; } if (!$s) die("No Content!!"); $fp = @fopen($filename,"a+"); if (!$fp) die("repeat"); $re_time = 0; while(!@flock($fp, LOCK_EX)) { sleep(1); $re_time++; if ($re_time >=4) break; } if ($re_time <4) { @fputs($fp,$s); @flock($fp, LOCK_UN); } else die("repeat"); @fclose($fp); echo "OK"; } else if ($action == "read") { $first = $_POST["first"]; $lastmod = intval($_POST["lastmod"]) - $get_past_sec; //得到两秒以内的所有发言， $alastmod = @filemtime($filename); $name = $_POST['name']; $name = str_replace("\n","",$name); $ip = get_ip(); $json = array(); $json["lastmod"] = time(); $item = array(); $newonline = array(); $offline = array(); $fp = @fopen($filename,'r'); flock($fp,LOCK_EX); $s = fread($fp,filesize($filename)); flock($fp,LOCK_UN); fclose($fp); $lines = explode("\n",$s); if ($alastmod >= $lastmod && !$first) { foreach($lines as $l) { $item2 = array(); $l = str_replace(array("\n","\r"),"",$l); if (strpos($l,"|") === false) continue; $arr = explode("|",$l); $t = intval($arr[0]); if ($t >= $lastmod) { $item2["time"] = date("H:i:s",$t); $item2["word"] = addslashes($arr[1]); $item[] = $item2; } } } else if ($first) { $item = array(); $total = count($lines); for($i=$total-1;$i>=$total-$least;$i--) { if ($i<=0) break; $item2 = array(); $l = str_replace(array("\n","\r"),"",$lines[$i]); if (strpos($l,"|") === false) continue; $arr = explode("|",$l); $t = intval($arr[0]); $item2["time"] = (date("m-d",time()) == date("m-d",$t))?date("H:i:s",$t):date("m-d H:i",$t); $item2["word"] = addslashes($arr[1]); $item[] = $item2; } $item = array_reverse($item); } $s = ""; $nt = time(); $onlines = array(); if($disonline && $touchme) { $users = @file($datafile); foreach($users as $l) { $l = str_replace(array("\r","\n"),"",$l); if (strpos($l,"|") === false) { $s.=$l."\n"; continue; } $arr = explode("|",$l); if ($nt - intval($arr[1]) < $touchs*3) { if (trim($name) == trim($arr[2])) { $s.= $arr[0]."|".time()."|".$name."|".get_ip()."|\n"; } else $s.=$l."\n"; $onlines [] = $arr[2]; } } @file_put_contents($datafile,$s); $json["onlines"] = $onlines; } $js