值得分享的php+ajax实时聊天室

非常经典的一款php+ajax实时聊天室,其中使用PHP文件保存聊天记录,按天划分,PHP实现聊天的功能只有一个文件，整合了PHP与AJAX技术，也就是说只要运行这一个文件就可以启动PHP的聊天室了，关于代码上面也是非常的简单，但是实现了聊天室一般的功能，聊天时的昵称，更改昵称的颜色，聊天字号大小，字体，加粗，窗体的变大变小等等，如果你想搞个聊天室来玩玩，这个源码完全可以满足普通的需求。

具体的效果看如下图:

关键代码：

    <?php
    header('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
    {
    ?>

安装说明:

因为这一款php+ajax实时聊天室的聊天记录是保存到PHP文件中的,所以不用导入数据库,安装自然也就方便多了,只需要将下载的文件包解压缩到可以运行PHP的根目录下即可.

源码下载：php+ajax实时聊天室

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