1.前端用户注册表单，用table布局，用ajax的$.post()方法传递要验证的数据，用get方法传送标志。
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>用户注册</title>
<style type="text/css">
table {
background-color: wheat;
box-shadow: 3px 3px 3px #888;
border-radius: 3%;
padding: 15px;
margin: 30px auto;
}
table td {
padding: 4px;
}
table caption {
font-size: 1.3em;
margin-bottom: 10px;
}
textarea {
resize: none;
}
form table button {
width: 80px;
height: 30px;
cursor: pointer;
border: none;
background-color: skyblue;
color: white;
}
form table button:hover {
background-color: orangered;
color: white;
font-size:1.05em;
}
form table select{
height: 24px;
}
</style>
</head>
<body>
<form id="register">
<table>
<caption>用户注册</caption>
<tr>
<td><label for="email">邮箱:</label></td>
<td><input type="email" name="email" id="email" autofocus=""></td>
</tr>
<tr>
<td><label for="password1">密码:</label></td>
<td><input type="password" name="password1" id="password1"></td>
</tr>
<tr>
<td><label for="password2">确认:</label></td>
<td><input type="password" name="password2" id="password2" placeholder="再次输入密码"></td>
</tr>
<tr>
<td><label for="secret">性别:</label></td>
<td>
<input type="radio" name="gender" id="male" value="male" ><label for="male">男</label>
<input type="radio" name="gender" id="female" value="female"><label for="female">女</label>
<input type="radio" name="gender" id="secret" value="secret" checked="" ><label for="secret">保密</label>
</td>
</tr>
<tr>
<td><label for="level">身份:</label></td>
<td>
<select name="level" id="level">
<option value="0">供应商</option>
<option value="1" selected="">经销商</option>
<option value="2">来逛逛</option>
</select>
</td>
</tr>
<tr>
<td><label for="php">产品:</label></td>
<td>
<input type="checkbox" name="lang[]" id="php" value="发动" checked><label for="php">发动</label>
<input type="checkbox" name="lang[]" id="java" value="java"><label for="java">底盘</label>
<input type="checkbox" name="lang[]" id="python" value="php"><label for="python">变速箱</label>
<input type="checkbox" name="lang[]" id="c" value="c"><label for="c">杂项</label>
</td>
</tr>
<tr>
<td valign="top"><label for="comment">简介:</label></td>
<td><textarea name="comment" id="comment" rows="3" cols="30"></textarea></td>
</tr>
<tr>
<td colspan="2" align="center">
<button type="submit" name="submit" id="submit" value="submit">提交</button>
</td>
</tr>
</table>
</form>
<script type="text/javascript" src="../jquery.js"></script>
<script type="text/javascript">
//注册邮箱验证
$('#email').blur(function(){
$.post('admin/check.php?check=email', 'email='+$('#email').val(), function(data){
switch(data.status) {
case 0: //非空
$('td').find('span').remove()
$('#email').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
break;
case 1: //格式
$('td').find('span').remove()
$('#email').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
break;
case 2: //排除已注册邮箱
$('td').find('span').remove()
$('#email').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
break;
case 3: //合法输入
$('td').find('span').remove()
$('#email').after('<span>').next().text(data.msg).css('color', 'green')
break;
}
},'json')
})
//密码验证
$('#password1').blur(function(){
if ($('#email').val().length == 0) {
return false
}
$.post('admin/check.php?check=password1','password1='+$('#password1').val(),function(data){
if(data.status == 0) { //非空
$('td').find('span').remove() //清空前一次的提示信息
$('#password1').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
return false
}
},'json')
})
//确认密码验证
$('#password2').blur(function(){
//邮箱或密码无输入处理，避免出现无限制请求，陷入死循环
if ($('#email').val().length == 0 || $('#password1').val().length == 0) {
return false
}
$.post('admin/check.php?check=password2', {
password1: $('#password1').val(),
password2: $('#password2').val()
}, function(data){
if (data.status == 0 ) {
$('td').find('span').remove()
$('#password2').after('<span>').next().text(data.msg).css('color', 'red')
$('#password1').focus() //焦点定位到password1
} else {
$('td').find('span').remove()
$('#password2').after('<span>').next().text(data.msg).css('color', 'green')
}
},'json')
})
//简介验证
$('#comment').blur(function(){
if ($('#email').val().length == 0 || $('#password1').val().length == 0 || $('#password1').val().length == 0) {
return false
}
$.post('admin/check.php?check=comment', 'comment='+$('#comment').val(), function(data){
if(data.status == 0) {
$('td').find('span').remove()
$('#comment').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
} else {
$('td').find('span').remove()
$('#comment').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
}
},'json')
})
//提交数据
$('#submit').click(function(){
$.post('admin/check.php?check=submit', $('#register').serialize(), function(data){
$('td').find('span').remove()
alert(data)
},'text')
})
</script>
</body>
</html>运行实例 »
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2.后台验证代码，用系统变量_POST和_GET获取前端传递的表单数据及标志，然后将验证结果（标志dtatus,信息msg）返送前端。
实例
<?php
// echo '<pre>';
// print_r($_POST);
switch ($_GET['check']) {
//验证邮箱
case 'email':
$email = $_POST['email'];
if (empty($email)) {
exit(json_encode(['status'=>0,'msg'=>'邮箱不能为空']));
} else if(!isEmail($email)) {
exit(json_encode(['status'=>1,'msg'=>'邮箱格式错误']));
} else if (in_array($email, ['admin@php.cn','zhu@php.cn'])){
exit(json_encode(['status'=>2,'msg'=>'邮箱已被注册']));
} else {
exit(json_encode(['status'=>3,'msg'=>'通过验证']));
}
break;
//验证密码
case 'password1':
$password1 = $_POST['password1'];
if (empty($password1)) {
exit(json_encode(['status'=>0,'msg'=>'密码不能为空']));
}
break;
//验证确认密码，只需验证两次输入是否一致，因为第一次输入已经进行了非空验证
case 'password2':
$password1 = $_POST['password1'];
$password2 = $_POST['password2'];
if ($password1 != $password2){
exit(json_encode(['status'=>0,'msg'=>'输入不一致']));
} else {
exit(json_encode(['status'=>1,'msg'=>'验证通过']));
}
break;
//简介验证，非空与字符长度同时验证，字符小于10包括0
case 'comment':
$comment = $_POST['comment'];
if (mb_strlen(trim($comment)) < 10) {
exit(json_encode(['status'=>0,'msg'=>'请填入不少于10个字符的内容']));
} else {
exit(json_encode(['status'=>1,'msg'=>'通过']));
}
break;
//提交验证
case 'submit':
exit('恭喜,注册成功');
}
// 验证邮箱格式
function isEmail($email)
{
$mode = '/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/';
if(preg_match($mode,$email)){
return true;
} else {
return false;
}
} 运行实例 »
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3.运行效果截图
