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.

以上就是本文的全部内容，希望对大家的学习有所帮助