本篇使用Ajax实现页面无刷新验证用户名是否存在。
七、注册页面实现
1、注册页面设计
register.php部分代码：
<tr> <!-- 注册表 --> <td colSpan=3 valign="baseline" style="BACKGROUND-IMAGE: url( images/bg.jpg); VERTICAL-ALIGN: middle; HEIGHT: 450px; TEXT-ALIGN: center"><br> <form name="myform" action="register_deal.php" method="post"> <table width="85%" border="1" align=center cellpadding=3 cellspacing=2 bordercolor="#FFFFFF" bgcolor="#FFFFFF" class=i_table> <tr align="left" bgcolor="#EFF7DE"> <td height=22 colspan=2 bgcolor="#EFF7DE" class=right_head><span class="tableBorder_LTR">必填内容</span></td> </tr> <tr bgcolor="#FFFFFF"> <td width=22% align="right" valign=middle class='f_one'> 用户名</td> <td width=78% align="left" class='f_one'><input name='txt_regname' type=text id="txt_regname" value='' size=20 maxlength=14 onblur="javascript:chkUserName();"/> <label id="l1">*</label><label id="ll1" class="label2"></label> </td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" valign=middle > 真实姓名</td> <td align="left" > <input name='txt_regrealname' type='text' id="txt_regrealname" size='20' maxlength='75' onblur="javascript:chkRealName()"/> <label id="l4">*</label><label id="ll4" class="label2"></label></td> </tr> <tr> <tr bgcolor="#FFFFFF"> <td align="right" valign=middle > 密码</td> <td align="left"> <input name='txt_regpwd' type='password' id="txt_regpwd" size=20 maxlength=75 onblur="javascript:chkPwd();"/> 英文字母或数字等不少于3位<label id="l2">*</label><label id="ll2" class="label2"></label></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" valign=middle> 确认密码</td> <td align="left" > <input name='txt_regpwd2' type='password' id="txt_regpwd2" size=20 maxlength=75 onBlur="javascript:chkRePwd()"> <label id="l3">*</label><label id="ll3" class="label2"></label></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" > 出生日期</td> <td align="left" > <span class="word_grey"> <input name="txt_birthday" type="text" id="birth" onblur="javascript:chkBirth()"> （日期格式为：yyyy-mm-dd）<label id="l6">*</label><label id="ll6" class="label2"></label></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" valign=middle> Email</td> <td align="left" > <input name=txt_regemail type=text id="txt_regemail" value='' size=35 maxlength=75 onblur="javascript:chrEmail()"/> <font color='#000000'>公开邮箱 <label id="l5">*</label><label id="ll5" class="label2"></label></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right">所在城市</td> <td align="left"> <select name="txt_province" id="txt_province" onchange="javascript:initcity();"> <SCRIPT>creatprovince();</SCRIPT> </select> <select name="txt_city" id="txt_city" > </select> <font color="red">*</font> </td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" valign=middle class='f_one'> 选择头像：</td> <td align="left" class='f_one'><table width="106" cellpadding="0" cellspacing="0"> <tr> <td width="10" height="47"> </td> <td width="80"><img src=" images/head/0.gif" name="img" id = "image" width="60" height="60"></td> <td width="53" rowspan="2" align="center"><font color=red>*</font></td> </tr> <tr> <td> </td> <td> <select name="txt_ico" size="1" id="txt_ico" onChange="javascript:showlogo()"> <option value="0.gif" selected>头像1 <option value="1.gif">头像2 <option value="2.gif">头像3 <option value="3.gif">头像4</option> <option value="4.gif">头像5</option> <option value="5.gif">头像6</option> </select> </td> </tr> </table></td> </tr> <tr align="left" bgcolor="#EFF7DE"> <td height=22 colspan=2 class=right_head><span class="tableBorder_LTR">选填内容</span></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" class='f_one'> 性别</td> <td align="left" class='f_one'> <select name=txt_regsex id="txt_regsex"> <OPTION value=1>男</OPTION> <OPTION value=2>女</OPTION> <OPTION value=0 selected>保密</OPTION> </select></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" class='f_one'>QQ</td> <td align="left" class='f_one'><input name='txt_regqq' type=text id="txt_regqq" value='' size=20 maxlength=14></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" class='f_one'> 个人主页</td> <td align="left" class='f_one'> <input name='txt_reghomepage' type=text id="txt_reghomepage" value='' size=40 maxlength=75></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" valign=middle class='f_one'>个性化签名</td> <td align="left" class='f_one'><textarea name='txt_regsign' cols=50 rows='4' id="txt_regsign"></textarea></td> </tr> <tr bgcolor="#FFFFFF"> <td align="right" class='f_one'> 自我简介</td> <td align="left" class='f_one'><textarea name=txt_regintroduce cols=50 rows=4 id="txt_regintroduce"></textarea></td> </tr> </table> <br> <input type='submit' name='regsubmit' value='提 交'class="btn_grey" onClick="return check()"> <input name="reset" type="reset" class="btn_grey" value="重 填"> </form> </td> </tr>
2、输入框失去焦点后调用的javascript函数实现：fun.js：
function chkUserName(){ var c = document.getElementById('txt_regname'); var d = c.value; var id; if(d==""){ document.getElementById('l1').innerText="请输入用户名"; document.getElementById('ll1').innerText=""; }else{ var xmlObj; xmlObj = new XMLHttpRequest(); xmlObj.open('POST','chk.php?d='+d,true); xmlObj.onreadystatechange = callBackFun; xmlObj.send(null); function callBackFun() { if(xmlObj.readyState == 4&&xmlObj.status ==200){ if(xmlObj.responseText=='y'){ document.getElementById('l1').innerText="×"; document.getElementById('ll1').innerText=""; }else{ document.getElementById('l1').innerText=""; document.getElementById('ll1').innerText="√"; } } } }}function chkRealName(){ var c = document.getElementById('txt_regrealname'); var d = c.value; if(d==""){ document.getElementById('l4').innerText="请输入真实姓名"; document.getElementById('ll4').innerText=""; }else{ document.getElementById('l4').innerText=""; document.getElementById('ll4').innerText="√"; }}function chkPwd(){ var p = document.getElementById('txt_regpwd').value; var c = document.getElementById('ll1').innerText; if(c=="√"){ if(p==""){ document.getElementById('l2').innerText="请输入密码"; } else if(p.length<3){ document.getElementById('l2').innerText="×"; document.getElementById('ll2').innerText=""; }else{ document.getElementById('l2').innerText=""; document.getElementById('ll2').innerText="√"; } }}function chkRePwd(){ var p = document.getElementById('txt_regpwd').value; var rp = document.getElementById('txt_regpwd2').value; var c = document.getElementById('ll2').innerText; if(c=="√"){ if(p==rp){ document.getElementById('ll3').innerText="√"; document.getElementById('l3').innerText=""; }else{ document.getElementById('ll3').innerText=""; document.getElementById('l3').innerText="× 密码不一致"; } }}function chkBirth(){ var c = document.getElementById('birth'); var d = c.value; if(d==""){ document.getElementById('l6').innerText="请输入出生日期"; document.getElementById('ll6').innerText=""; }else{ document.getElementById('l6').innerText=""; document.getElementById('ll6').innerText="√"; }}function chkEmail(){ var e = document.getElementById('txt_regemail').value; if(e==""){ document.getElementById('l5').innerText="请输入邮箱"; document.getElementById('ll5').innerText=""; }else{ document.getElementById('l5').innerText=""; document.getElementById('ll5').innerText="√"; }}3、Ajax验证用户名使用的处理文件chk.php:
'
<?php require_once 'Conn/SqlHelper.class.php'; $chk = $_REQUEST['d']; $sqlHelper = new SqlHelper(); $sql = "select * from tb_user where regname='$chk';"; $res = $sqlHelper->execute_dql($sql); $s = $res->fetch_assoc(); if(count($s)!=0){ echo 'y'; }else{ echo 'n'; }4、注册后将用户添加到数据库registerdeal.php
<?phpsession_start();include "Conn/SqlHelper.class.php";$sqlHelper = new SqlHelper();$UserName=$_POST['txt_regname'];$sql="select * from tb_user where regname = '$UserName'";$res = $sqlHelper->execute_dql($sql);$result=$res->fetch_assoc();if (count($result)!=0){ echo ("<script>alert('用户名已被注册！');history.go(-1);</script>"); exit();}$_SESSION['username']=$_POST['txt_regname'];$regname=$_POST['txt_regname'];$regrealname=$_POST['txt_regrealname'];$regpwd=$_POST['txt_regpwd'];$regbirthday=$_POST['txt_birthday'];$regemail=$_POST['txt_regemail'];$regcity=$_POST['txt_province'].$_POST['txt_city'];$regico=$_POST['txt_ico'];$regsex=$_POST['txt_regsex'];$regqq=$_POST['txt_regqq'];$reghomepage=$_POST['txt_reghomepage'];$regsign=$_POST['txt_regsign'];$regintroduce=$_POST['txt_regintroduce'];$ip=getenv(REMOTE_ADDR);$sql = "Insert Into tb_user (regname,regrealname,regpwd,regbirthday,regemail,regcity,regico,regsex,regqq,reghomepage,regsign,regintroduce,ip,fig)"." Values ('$regname','$regrealname','$regpwd','$regbirthday','$regemail','$regcity','$regico','$regsex','$regqq','$reghomepage','$regsign','$regintroduce','$ip',0)";$INS=$sqlHelper->execute_dml($sql);echo "<script> alert('用户注册成功！');</script>";echo "<script> window.location='index.php';</script>";?>