非常經(jīng)典的一款php+ajax實(shí)時(shí)聊天室,其中使用PHP文件保存聊天記錄,按天劃分,PHP實(shí)現(xiàn)聊天的功能只有一個(gè)文件，整合了PHP與AJAX技術(shù)，也就是說只要運(yùn)行這一個(gè)文件就可以啟動PHP的聊天室了，關(guān)于代碼上面也是非常的簡單，但是實(shí)現(xiàn)了聊天室一般的功能，聊天時(shí)的昵稱，更改昵稱的顏色，聊天字號大小，字體，加粗，窗體的變大變小等等，如果你想搞個(gè)聊天室來玩玩，這個(gè)源碼完全可以滿足普通的需求。
    具體的效果看如下圖:
    
    關(guān)鍵代碼：
    <?php
    header('content-type:text/html;charset=utf-8');
    //顯示在線用戶
    $disonline = 1;
    //新登陸時(shí)顯示最近內(nèi)容的條數(shù)(默認(rèn)為30條)
    $leastnum = 30;
    //默認(rèn)的房間名(默認(rèn)是每天換一個(gè)文件)，如果去掉d，則是每月?lián)Q一個(gè)文件
    $room = date("Y-m-d");
    //房間保存路徑,必須仿quot;/"結(jié)尾,可以丿quot;../"，等
    $roomdir = "rooms/";
    //編碼方式
    $charset = "UTF-8";
    //客戶端最大顯示內(nèi)容條數(shù)(建議不要太大)
    $maxdisplay = 300;
    //語言包
    $lang = array(
    //聊天室描述
    "description"=>"聊天室.", 
    //聊天室標(biāo)題
    "title"=>"Welcome...!",
    //第一個(gè)到聊天室的歡迎
    "firstone"=>"<span style='font-size:16px;color:blue;'>Welcome...!</span>", 
    //當(dāng)信息有禁止內(nèi)容時(shí)顯示
    "ban" => array('法輪功', '共產(chǎn)黨', '李洪志', 'fuck', '叼', '你媽的', '他媽的'),
    //關(guān)鍵字
    "keywords"=>"Welcome...!",
    //發(fā)言提示
    "hereyourwords" => "在這里發(fā)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") $font = "宋體";
     else if ($font == "heiti") $font = "黑體";
     else if ($font == "kaiti") $font = "楷體_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
    {
    ?>
    安裝說明:
    因?yàn)檫@一款php+ajax實(shí)時(shí)聊天室的聊天記錄是保存到PHP文件中的,所以不用導(dǎo)入數(shù)據(jù)庫,安裝自然也就方便多了,只需要將下載的文件包解壓縮到可以運(yùn)行PHP的根目錄下即可.
    以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助