zoukankan html css js c++ java

php+ajax+jq

<html>
<head>
<meta charset="UTF-8">
<title>JQueryAjax+PHP</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.0.0.min.js"></script>
</head>
<body>
用户名:<input type="text" id="username" name="username" /><br>
密码:<input type="password" id="password" name="password" /><br>
<button type="button" class="butn">ajax提交</button><br>
<span class="con"></span>
<script type="text/javascript">
$(document).ready(function(){
$(".butn").click(function(){
var username = $("#username").val();
var password = $("#password").val();
$.post('ajax.php',{name:username,pwd:password},function(data) {
alert(data);
$(".con").html(data);
})
})
})
</script>
</body>
</html>

<html>
<head>
<meta charset="UTF-8">
<title>JQueryAjax+PHP</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.0.0.min.js"></script>
</head>
<body>
    用户名:<input type="text" id="username" name="username" /><br>
    密码:<input type="password" id="password" name="password" /><br>
    <button type="button" class="butn">ajax提交</button><br>
    <span class="con"></span>
<script type="text/javascript">
$(document).ready(function(){
    $(".butn").click(function(){
        var username = $("#username").val();
        var password = $("#password").val();
        $.post('ajax.php',{name:username,pwd:password},function(data) {
            alert(data);
            $(".con").html(data);
        })
    })
})
</script>
</body>
</html>

ajax.php：

ajax.php
<?php
echo '用户名:',$_POST['name'],',密码：',$_POST['pwd']."<br>";
//这里可以进行一些操作，比如数据库交互
echo "操作完毕";
?>

ajax.php
<?php 
echo '用户名:',$_POST['name'],',密码：',$_POST['pwd']."<br>";
//这里可以进行一些操作，比如数据库交互


echo "操作完毕";
?>

在非json格式下，后台只能返回字符串，如果想后台返回数组，可以采用json格式

例如将JQueryAjax中的代码修改为如下形式：

<html>
<head>
<meta charset="UTF-8">
<title>JQueryAjax+PHP</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.0.0.min.js"></script>
</head>
<body>
用户名:<input type="text" id="username" name="username" /><br>
密码:<input type="password" id="password" name="password" /><br>
<button type="button" class="butn">ajax提交</button><br>
<span class="con"></span>
<script type="text/javascript">
$(document).ready(function(){
$(".butn").click(function(){
var username = $("#username").val();
var password = $("#password").val();
$.ajax({
url: "ajax.php",
type: "POST",
data:{name:username,pwd:password},
dataType: "json",
error: function(){
alert('Error loading XML document');
},
success: function(data,status){//如果调用php成功
alert(status);
alert(data);
$('.con').html("用户名:"+data[0]+"密码:"+data[1]);
}
});
})
})
</script>
</body>
</html>

<html>
<head>
<meta charset="UTF-8">
<title>JQueryAjax+PHP</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.0.0.min.js"></script>
</head>
<body>
    用户名:<input type="text" id="username" name="username" /><br>
    密码:<input type="password" id="password" name="password" /><br>
    <button type="button" class="butn">ajax提交</button><br>
    <span class="con"></span>
<script type="text/javascript">
$(document).ready(function(){
    $(".butn").click(function(){
        var username = $("#username").val();
        var password = $("#password").val();
        $.ajax({
             url: "ajax.php",  
             type: "POST",
             data:{name:username,pwd:password},
             dataType: "json",
             error: function(){  
                 alert('Error loading XML document');  
             },  
             success: function(data,status){//如果调用php成功 
                alert(status);
                alert(data);
                $('.con').html("用户名:"+data[0]+"密码:"+data[1]);
             }
        });
    })
})
</script>
</body>
</html>

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原文地址：https://www.cnblogs.com/KLYY/p/6509255.html