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本篇文章為大家展示了如何在PHP中利用mysql與ajax實現(xiàn)一個聊天室功能,內(nèi)容簡明扼要并且容易理解,絕對能使你眼前一亮,通過這篇文章的詳細介紹希望你能有所收獲。
1. 創(chuàng)建mysql數(shù)據(jù)庫表:
復(fù)制代碼 代碼如下:
create table chat( id bigint AUTO_INCREMENT,username varchar(20), chatdate datetime,msg varchar(500), primary key(id));
2.編寫建議連接數(shù)據(jù)庫函數(shù):
dbconnect.php
<?php function db_connect() { date_default_timezone_set("Asia/Shanghai"); $link = mysql_connect("xxx.xxx.xxx.xxx", "databasename", "password") or die('無法連接: ' . mysql_error()); mysql_select_db("databasename") or die('沒有你找到指定數(shù)據(jù)庫'); return true; } function quote($strText) { $Mstr = addslashes($strText); return "'" . $Mstr . "'"; } function isdate($d) { $ret = true; try { $x = date("d",$d); } catch (Exception $e) { $ret = false; } echo $x; return $ret; } ?>
3. 編寫ajax發(fā)送和接收函數(shù):
ajax發(fā)送函數(shù)chat_send_ajax.php
<?php require_once('dbconnect.php'); db_connect(); $msg = iconv("UTF-8","GB2312",$_GET["msg"]); $dt = date("Y-m-d H:i:s"); $user = iconv("UTF-8","GB2312",$_GET["name"]); $sql="INSERT INTO chat(USERNAME,CHATDATE,MSG) " . "values(" . quote($user) . "," . quote($dt) . "," . quote($msg) . ");"; echo $sql; $result = mysql_query($sql); if(!$result) { throw new Exception('Query failed: ' . mysql_error()); exit(); } ?>
ajax接收函數(shù)chat_recv_ajax.php
<?php header("Content-Type:text/html;charset=gb2312"); header("Expires: Thu, 01 Jan 1970 00:00:01 GMT"); header("Cache-Control: no-cache, must-revalidate"); header("Pragma: no-cache"); require_once('dbconnect.php'); db_connect(); $sql = "SELECT *, date_format(chatdate,'%Y年%m月%d日 %r') as cdt from chat order by ID desc limit 200"; $sql = "SELECT * FROM (" . $sql . ") as ch order by ID"; $result = mysql_query($sql) or die('Query failed: ' . mysql_error()); // Update Row Information $msg="<table border='0' style='font-size: 10pt; color: white; font-family: verdana, arial;'>"; while ($line = mysql_fetch_array($result, MYSQL_ASSOC)) { $msg = $msg . "<tr><td>" . $line["cdt"] . " </td>" . "<td>" . $line["username"] . ": </td>" . "<td>" . $line["msg"] . "</td></tr>"; } $msg=$msg . "</table>"; echo $msg; ?>
4.聊天室頁面:
chat.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>聊天頁面</title> <script type="text/javascript"> var t = setInterval(function(){get_chat_msg()},5000); // // General Ajax Call // var oxmlHttp; var oxmlHttpSend; function get_chat_msg() { if(typeof XMLHttpRequest != "undefined") { oxmlHttp = new XMLHttpRequest(); } else if (window.ActiveXObject) { oxmlHttp = new ActiveXObject("Microsoft.XMLHttp"); } if(oxmlHttp == null) { alert("瀏覽器不支持XML Http Request!"); return; } oxmlHttp.onreadystatechange = get_chat_msg_result; oxmlHttp.open("GET",encodeURI("chat_recv_ajax.php"),true); oxmlHttp.send(null); } function get_chat_msg_result() { if(oxmlHttp.readyState==4 || oxmlHttp.readyState=="complete") { if (document.getElementById("DIV_CHAT") != null) { document.getElementById("DIV_CHAT").innerHTML = oxmlHttp.responseText; oxmlHttp = null; } var scrollDiv = document.getElementById("DIV_CHAT"); scrollDiv.scrollTop = scrollDiv.scrollHeight; } } function set_chat_msg() { if(typeof XMLHttpRequest != "undefined") { oxmlHttpSend = new XMLHttpRequest(); } else if (window.ActiveXObject) { oxmlHttpSend = new ActiveXObject("Microsoft.XMLHttp"); } if(oxmlHttpSend == null) { alert("瀏覽器不支持XML Http Request!"); return; } var url = "chat_send_ajax.php"; var strname="noname"; var strmsg=""; if (document.getElementById("txtname") != null) { strname = document.getElementById("txtname").value; document.getElementById("txtname").readOnly=true; } if (document.getElementById("txtmsg") != null) { strmsg = document.getElementById("txtmsg").value; document.getElementById("txtmsg").value = ""; } url += "?name=" + strname + "&msg=" + strmsg; oxmlHttpSend.open("GET",encodeURI(url),true); oxmlHttpSend.send(null); } function clickBtn(e) { if(window.event.keyCode==13) { var id=e.id; switch(id) { case "txtmsg": document.getElementById("Submit2").click(); window.event.returnValue=false; break; } } } function fRandomBy(under, over){ switch(arguments.length){ case 1: return parseInt(Math.random()*under+1); case 2: return parseInt(Math.random()*(over-under+1) + under); default: return 0; } } function SetTxtName(){ var i=fRandomBy(10); if(i==0)document.getElementById('txtname').value='無敵戰(zhàn)神'; if(i==1)document.getElementById('txtname').value='令狐沖'; if(i==2)document.getElementById('txtname').value='西門吹雪'; if(i==3)document.getElementById('txtname').value='超級瑪麗'; if(i==4)document.getElementById('txtname').value='奧巴馬'; if(i==5)document.getElementById('txtname').value='恐怖分子'; if(i==6)document.getElementById('txtname').value='聊齋奇女子'; if(i==7)document.getElementById('txtname').value='天朝?潘?; if(i==8)document.getElementById('txtname').value='中500萬了'; if(i==9)document.getElementById('txtname').value='神級奇葩'; if(i==10)document.getElementById('txtname').value='愛你不是兩三天'; } </script> </head> <body onload="SetTxtName();"> <div style="border-right: black thin solid; border-top: black thin solid; border-left: black thin solid; border-bottom: black thin solid; background:#fff url('http://www.ihaonet.com/chat/blue.jpg') repeat-x left top; height: 450px;width: 500px; "> <table > <tr> <td colspan="2" style="font-weight: bold; font-size: 16pt; color: white; font-family: verdana, arial; text-align: center"> 聊天窗口--全球最大QQ聊天交友網(wǎng)站</td> </tr> <tr> <td colspan="2" style="font-weight: bold; font-size: 16pt; color: white; font-family: verdana, arial; text-align: left"> <table > <tr> <td > 名字:</td> <td ><input id="txtname" type="text" name="name" maxlength="15" value="匿名" /></td> </tr> </table> </td> </tr> <tr> <td valign="middle" colspan="2"> <div id="DIV_CHAT"> </div> </td> </tr> <tr> <td > <input id="txtmsg" type="text" name="msg" onkeydown="return clickBtn(this)"/></td> <td > <input id="Submit2" type="button" value="發(fā)送" onclick="set_chat_msg()"/></td> </tr> <tr> <td colspan="1" > </td> <td colspan="1" > </td> </tr> </table> </div> </body> </html>
上述內(nèi)容就是如何在PHP中利用mysql與ajax實現(xiàn)一個聊天室功能,你們學(xué)到知識或技能了嗎?如果還想學(xué)到更多技能或者豐富自己的知識儲備,歡迎關(guān)注億速云行業(yè)資訊頻道。
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