Detailed explanation of the steps to load data using ajax-JS Tutorial-php.cn

Detailed explanation of the steps to load data using ajax

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Release： 2018-03-31 16:12:42

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This time I will bring you a detailed explanation of the steps for loading data through ajax. What are the precautions for loading data through ajax? The following is a practical case, let's take a look.

The specific code for loading data is for your reference. The specific content is as follows

##1.xssj.php

<script src="jquery-3.2.0.min.js"></script>
<title>无标题文档</title>
</head>
<body>
<h1>显示数据</h1>
<select id="sel">
</select>
<input type="button" value="取选中值" id="qu" />
</body>
<script type="text/javascript">
$(document).ready(function(e) {
  
  //异步AJAX ：执行chuli页面的同时,继续执行下面代码。效率高,不用等待,继续执行下面代码
  //异步和同步 同步：效率不高,不能同时执行两件事情
  $.ajax({
    //async:false,//把异步关闭,相当于开启同步
    url:"xschuli.php",
    dataType:"TEXT",
    //complete: function(){},//执行完成之后执行
    //beforeSend: function(){},//发送处理请求之前,自动处理此方法 complete和beforeSend可以实现进度条
    //error: function(){},//如果出错了执行此方法
    success: function(data){ //success: function(){}是执行完成之前执行
      var hang = data.split("|");
      var str = "";
      for(var i=0;i<hang.length;i++)
      {
       var lie = hang[i].split("^");
       str = str+"<option value=&#39;"+lie[0]+"&#39;>"+lie[1]+"</option>";
      }
      $("#sel").html(str);
      //alert($("#sel").val());
     }
   });
   
   //alert($("#sel").val());
   
   $("#qu").click(function(){
     alert($("#sel").val());
    })
});
</script>
</html>

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2.xschuli.php

<?php
require "DBDA.class.php";
$db = new DBDA();
$sql ="select * from nation";
//$arr = $db->query($sql,1);
//var_dump($arr);
"n001^汉族|n002^壮族|n003^维吾尔族";
echo $db->strquery($sql);
/*$str="";
foreach($arr as $v)
{
 $str = $str.implode("^",$v)."|";
}
$str = substr($str,0,strlen($str)-1);
echo $str;*/

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!