4月16日作业——实例:用php+ajax来处理表单 - 每日作业

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实例

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>4月16日作业——实例:用php+ajax来处理表单</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: 8px;
		}
		table caption {
			font-size: 1.5em;
			margin-bottom: 10px;
		}
		textarea {
			resize: none;
		}
		form table button {
			width: 100px;
			height: 30px;
			cursor: pointer;
			border: none;
			background-color: skyblue;
			color: white;
		}
		form table button:hover {
			background-color: orangered;
			color: white;
			font-size:1.1em;
		}
	</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"></td>
			</tr>
			<tr>
				<td><label for="secret">性别:</label></td>
				<td> <!-- 单选与众不同,点击标签会自动选择默认值 -->
					<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">级别</label></td>
				<td>
					<select name="level" id="level">
						<option value="0">小白</option>
						<option value="1" selected="">中级</option>
						<option value="2">大神</option>
				</select>
				</td>
			</tr>
			<tr>
				<td><label for="php">语言:</label></td>
				<td>  <!-- 点击标签会把php做为默认项之一选中 -->
					<input type="checkbox" name="lang[]" id="php" value="php"  checked><label for="php">php</label>
					<input type="checkbox" name="lang[]" id="java" value="java"><label for="java">java</label>
					<input type="checkbox" name="lang[]" id="python" value="php"><label for="python">python</label>
					<input type="checkbox" name="lang[]" id="c" value="c"><label for="c">c</label>
				</td>
			</tr>
			<tr>
				<td valign="middle"><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="http://libs.43d.cc/js/jquery-3.3.1.js"></script>
	<script type="text/javascript"></script>
	<script type="text/javascript">
		//请求邮箱验证
		$('#email').blur(function(){
			$.post('admin/check.php?check=email', 'email='+$('#email').val(), function(data){
				switch(data.status) {
					case 0:
					$('td').find('span').remove()
					$('#email').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
					break;
					case 1:
					$('td').find('span').remove()
					$('#email').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
					break;
					case 2:
					$('td').find('span').remove()
					$('#email').after('<span>').next().text(data.msg).css('color', 'green')
					break;
				}
				return false
			},'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) {
					//清空前一次的提示信息
					$('td').find('span').remove()
					//在文本框后面添加信息提示并设置焦点
					$('#password1').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
					//返回调用者
					return false
				}
			},'json') //返回数据为json格式
		})

		//确认密码验证
		$('#password2').blur(function(){
			//如果邮箱或密码没有输入,则什么都不做,直接返回
			if ($('#email').val().length == 0 || $('#password1').val().length == 0) {
				return false
			}
			$.post('admin/check.php?check=password2', {
				password1: $('#password1').val(),
				password2: $('#password2').val()
			}, function(data){
				switch(data.status) {
					case 0:
					$('td').find('span').remove()
					$('#password2').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
					break;
					case 1:
					$('td').find('span').remove()
					$('#password2').after('<span>').next().text(data.msg).css('color', 'red')
					//确认密码不对,应该将焦点设置到第一次的密码框内
					$('#password1').focus()
					break;
					case 2:
					$('td').find('span').remove()
					$('#password2').after('<span>').next().text(data.msg).css('color', 'green')
					break;
				}
				
			},'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){
				switch(data.status) {
					case 0:
					$('td').find('span').remove()
					$('#comment').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
					break;

					case 1:
					$('td').find('span').remove()
					$('#comment').after('<span>').next().text(data.msg).css('color', 'red').prev().focus();
					break;

					case 2:
					$('td').find('span').remove()
					$('#comment').after('<span>').next().text(data.msg).css('color', 'green').prev().focus();
					break;
				}
			},'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>

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实例

<?php 
// echo '<pre>';
// print_r($_POST);
 switch ($_GET['check']) {
 	//验证邮箱
 	case 'email': 		
		$email = $_POST['email']; // 设置默认值
		if (empty($email)) {
			exit(json_encode(['status'=>0,'msg'=>'邮箱不能为空']));
		} else if (in_array($email, ['admin@php.cn','zhu@php.cn'])){
			exit(json_encode(['status'=>1,'msg'=>'邮箱已占用']));
		} else {
			echo json_encode(['status'=>2,'msg'=>'邮箱可用']);
		}
 		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
 	case 'password2':
 		$password1 = $_POST['password1'];
 		$password2 = $_POST['password2'];
		if (empty($password2)) {
			exit(json_encode(['status'=>0,'msg'=>'确认不能为空']));
		} else if ($password1 != $password2){
			exit(json_encode(['status'=>1,'msg'=>'二次密码不相等']));
		}  else {
			exit(json_encode(['status'=>2,'msg'=>'验证通过']));
		}
		break; 	

	//简介验证(仅做非空验证)
	case 'comment':
		$comment = $_POST['comment'];
		if (empty($comment)) {
			exit(json_encode(['status'=>0,'msg'=>'简介不能为空']));
		} else if (mb_strlen(trim($comment)) < 10) {
			exit(json_encode(['status'=>1,'msg'=>'长度小于10个字符']));
		} else {
			exit(json_encode(['status'=>2,'msg'=>'通过']));
		}
		break;
 	//提交验证 
 	case 'submit':
 		//因为数据之前已经全部验证,这里直接返回结果即可
 		exit('恭喜,注册成功');

 }

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