4月10日作业—AJAX无刷新验证 - 每日作业

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<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>4月10日作业—AJAX无刷新验证</title>

	<style>
	form{ width:400px; margin: 30px auto; }
	label{ padding-right: 20px }
	</style>
</head>
<body>
	<form action="">
		<fieldset>
			<legend>AJAX无刷新验证</legend>
			<p><label>账号:<input type="text" name="name" placeholder="请输入用户名"></label></p>
			<p><label>密码:<input type="password" name="password" placeholder="请输入密码"></label></p>
			<!-- <hr width="90%" color="lightskyblue"> -->
			<!-- <p><button type="submit" name="submit">立即注册</button></p> -->
		</fieldset>
	</form>
</body>
</html>
<script type="text/javascript" src="http://mat1.gtimg.com/libs/jquery2/2.2.0/jquery.js"></script>
<script>
	$(':input').blur(function(){
		// alert('测试')

		$.ajax({
			url:'api/demo.php',//
			type:'GET',//
			dataType:'json',//
			async:true,
			data: $('form:first').serializeArray(),
			success:function(msg,status,xhr){
				console.log(msg)
				$('p span').empty()
				$('p').append($(msg))
			}
		})
	})

</script>

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实例

<?php 
// print_r($_GET);exit;
// 用数组模拟数据库中的已存在的用户名,这是不允许使用的
$nameList = ['admin','peter','php'];
//这是当前用户提交的用户名
$userName = $_GET['name'];
$passWord = $_GET['password'];

//判断用户名是否为空



if (strlen(trim($userName))==0) {
	echo '<span style="color:red">用户名或密码不能为空</span>';
//判断用户名是否为纯数字,这是不允许的
} else if (is_numeric($userName)) {
	echo '<span style="color:red">用户名不能为纯数字</span>';
//判断用户名是否已经被注册
} else if (in_array($userName, $nameList)) {
	echo '<span style="color:red">用户名太抢手了,换一个</span>';
//用户名可用提示
} else {
	echo '<span style="color:green">恭喜,用户名可用</span>';
}

if (strlen(trim($passWord))==0) {
	//判断密码是否为空
	echo '<span style="color:red">，密码不能为空</span>';
} else if (is_numeric($passWord)) {
	//判断用户名是否为纯数字,这是不允许的
	echo '<span style="color:red">，密码不能为纯数字</span>';
} else {
	//用户名可用提示
	echo '<span style="color:green">，密码可用</span>';
}

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Correction status：qualified

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