值得分享的php+ajax实时聊天室

<?phpheader('content-type:text/html;charset=utf-8');//显示在线用户$disonline = 1;//新登陆时显示最近内容的条数(默认为30条)$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$room = date("Y-m-d");//房间保存路径,必须仿quot;/"结尾,可以丿quot;../"，等$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 = 300;//语言包$lang = array(//聊天室描述"description"=>"聊天室.", //聊天室标题"title"=>"Welcome...!",//第一个到聊天室的欢迎"firstone"=>"<span style='font-size:16px;color:blue;'>Welcome...!</span>", //当信息有禁止内容时显示"ban" => array('法轮功', '共产党', '李洪志', 'fuck', '叼', '你妈的', '他妈的'),//关键字"keywords"=>"Welcome...!",//发言提示"hereyourwords" => "在这里发言!");$touchs = 10;$title = $lang["title"];$earlier = 10;$description = $lang["description"];$origroom = $room;$least = ($_GET["dis"])?intval($_GET["dis"]):$leastnum;if ($_GET["room"]) $room = $_GET["room"];$room = checkfilename($room);if (!$room) $room = $origroom;$filename = $roomdir.$room.".dat.php";$datafile = $roomdir.$room.".php";if (!is_dir($roomdir)) { @mkdir($roomdir, 0777) or exit('no this dir.');}if(file_exists($filename)){ if ((int)filemtime($filename) + 1800 < time()) { unlink($filename); }}if (!file_exists($filename)) @file_put_contents($filename,'<?php die();?>'."/n".time()."|".$lang["firstone"]."/n");if (!file_exists($datafile)) @file_put_contents($datafile,'<?php die();?>'."/n");$action = $_GET["action"];if (!function_exists("file_get_contents")){ function file_get_contents($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){ if (function_exists('json_encode')) return json_encode($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 $json;}if ($action == "write"){ $color = $_GET['color']; if (!eregi("[0-9a-fA-F]{6}",$color) || $color == "#000000") $color = ""; $color = "#".$color; $size = intval($_GET["size"]); $arr = @file("php://input"); $name = str_replace(array("/n","/r"),"",$arr[0]); $ip = get_ip(); if ($disonline) { $onlines = @file_get_contents($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(); } } } $s = ""; $style = ""; $font = $_GET["font"]; if ($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.";"; $style .= (!$_GET["bold"])?"":"font-weight:bold;"; $style .= (!$color || $color == "#")?"":"color:{$color};"; $style .= (!$size || $size == "16")?"":"font-size:{$size}px;"; $t = time(); for($i = 1;$i<count($arr);$i++) { $content = $arr[$i]; $content = str_replace(array("/n","/r"),"",$content); if ($content == "") continue; $content = preg_replace("!<img/s+(.*?)/>!i", "[img $1/]", $content); $content = str_replace(array('<', '>'), array('<', '>'), $content); $content = preg_replace("!/[img (.*?)//]!i", "<img $1/>", $content); $content = str_replace($lang['ban'], '', $content); $content = ($style)?"<span style='{$style}'>{$content}</span>":$content; $ubbarray = array('[:ani_wink:]', '[:big_eyes:]', '[:cool:]', '[:cry:]', '[:eye_roll:]', '[:grin:]', '[:happy:]', '[:not_impressed:]', '[:smile:]', '[:smile_eyes:]', '[:stickout:]', '[:straight:]', '[:surprised:]', '[:unhappy:]', '[:wink:]'); $content = str_replace($ubbarray,  array('<img src="smilies/ani_wink.gif" />', '<img src="smilies/big_eyes.gif" />', '<img src="smilies/cool.gif" />', '<img src="smilies/cry.gif" />', '<img src="smilies/eye_roll.gif" />', '<img src="smilies/grin.gif" />', '<img src="smilies/happy.gif" />', '<img src="smilies/not_impressed.gif" />', '<img src="smilies/smile.gif" />', '<img src="smilies/smile_eyes.gif" />', '<img src="smilies/stickout.gif" />', '<img src="smilies/straight.gif" />', '<img src="smilies/surprised.gif" />', '<img src="smilies/unhappy.gif" />', '<img src="smilies/wink.gif" />'),  $content); $s.= $t."|".$name.":".$content."/n"; } if (!$name) die("No Name!!"); if (!$s) die("No Content!!"); $fp = @fopen($filename,"a+"); if (!$fp) die("repeat"); if (@flock($fp, LOCK_EX)) { @fputs($fp,$s); @flock($fp, LOCK_UN); } else die("repeat"); @fclose($fp); echo "OK";}else if (trim($action) == "read"){ if (get_magic_quotes_runtime()) { set_magic_quotes_runtime(0); } $first = $_GET["first"]; $lastmod = intval($_GET["lastmod"]); $alastmod = @filemtime($filename); $name = file_get_contents("php://input"); $name = str_replace("/n","",$name); $ip = get_ip(); $json = array(); $json["lastmod"] = $alastmod; $item = array(); $newonline = array(); $offline = array(); $lines = @file($filename); 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); $item2["word"] = stripslashes($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); $item2["word"] = stripslashes($arr[1]); $item[] = $item2; } $item = array_reverse($item); } $s = ""; $nt = time(); $onlines = array(); if($disonline) { $users = @file($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]) < $touchs*2+1) { if (trim($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; } $json["lines"] = $item; echo array2json($json); if (!get_magic_quotes_runtime()) { set_magic_quotes_runtime(1); }}else{?>