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Detailed explanation of the steps to load data using ajax

php中世界最好的语言Original: 2018-03-31 16:12:422125browse

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>

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;*/

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!

Detailed explanation of the steps to load data using ajax

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