php+jQuery+Ajax simply implements asynchronous page refresh

php+jQuery+Ajax simply implements asynchronous page refresh_php example

WBOY

Release： 2016-08-17 13:02:32

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The page is displayed as follows:

The code in JQueryAjax.html is as follows (using the simpler $.post)

<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>

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ajax.php

<&#63;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";
&#63;>

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In non-json format, the background can only return strings. If you want to return an array in the background, you can use json format

For example, modify the code in JQueryAjax to the following form:

<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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ajax.php

<&#63;php 
$name = $_POST['name'];
$pwd = $_POST['pwd'];
$array = array("$name","$pwd");
//这里进行一个些操作，比如数据库交互

echo json_encode($array);//json_encode方式是必须的
&#63;>

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The operation effect is as follows: