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Homephp教程php手册注册页面之前先验证用户名是否存在的php代码

注册页面之前先验证用户名是否存在的php代码,需要的朋友可以参考下

reg.php
代码如下:








注册页面


error_reporting(0);
//不让PHP报告有错语发生。如果不关闭好有类似这的错语 Warning: preg_match() 关闭就不出现了
session_start();
header("Cache-control: private");
$conn = @ mysql_connect("localhost","root","")or die("数据库连接错误");
mysql_select_db("bbs",$conn);
mysql_query("set names utf8");
if($_POST['submit'])
{
$username = $_POST["username"];
$sql="select userName from user_info where userName='$username'";
// echo $sql;
$query=mysql_query($sql);
$rows = mysql_num_rows($query);
if($rows > 0){
echo "";
}else{
$user_in = "insert into user_info (username,pass,sex,qq,email,img) values ('$_POST[username]',md5('$_POST[pass]'),'$_POST[sex]','$_POST[qq]','$_POST[email]','$_POST[img_select]')";
//echo $user_in;
mysql_query($user_in);
echo "";
}
//javascript:history.go(-1)
}
?>
































用户:
性别:

保密
密码:
重复密码:
QQ:
邮箱:
头像:


我已有账号现在登录





func.js
代码如下:
//根据下拉框变换图片
function img_change(thisObj){
var imgsrc = "/bbs/img/"+ thisObj.value+".gif";
document.getElementById("tx_change").src=imgsrc;
}
//检查是否都符合 注册 要求
function check_reg()
{
if(check_len() && check_pass() && check_email() && check_qq())
{
return true;
}else{
return false;
}
}
//检查密码长度不能少于6
function check_len(thisObj){
if(thisObj.value.length==0)
{
document.getElementById('show_pass').innerHTML="密码不能为空";
return false;
}else{
if (thisObj.value.length{
document.getElementById('show_pass').innerHTML="密码长度不少于6";
return false;
}
document.getElementById('show_pass').innerHTML="";
return true;
}
}
//检查俩次密码输入是否一致
function check_pass(thisObj){
var psw=document.getElementById('pass');
if(psw.value.length==0)
{
document.getElementById('show_pass').innerHTML="密码不能为空";
return false;
}else{
document.getElementById('show_pass').innerHTML="";
if (thisObj.value!=psw.value)
{
document.getElementById('show_repass').innerHTML="两次密码输入不正确";
return false;
}
document.getElementById('show_repass').innerHTML="";
return true;
}
}
//检查email是否正确
function check_email(thisObj){
var reg=/^([a-zA-Z\d][a-zA-Z0-9_]+@[a-zA-Z\d]+(\.[a-zA-Z\d]+)+)$/gi;
var rzt=thisObj.value.match(reg);
if(thisObj.value.length==0){
document.getElementById('show_e').innerHTML="Email不能为空";
return false;
}else{
if (rzt==null)
{
document.getElementById('show_e').innerHTML="Email地址不正确";
return false;
}
document.getElementById('show_e').innerHTML="";
return true;
}
}
//检查qq格式是否正确
function check_qq(thisObj){
var qq=document.getElementById('qq').value;
var reg=/^\d+$/;
if(qq.search(reg))
{
document.getElementById('show_qq').innerHTML=" QQ 只能为数字";
return false;
}else{
document.getElementById('show_qq').innerHTML="";
return true ;
}
}

作者: sweet__smile
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