Introduction to usage examples of json_encode in php

In the last article, we introduced you to the detailed explanation of the json_encode() function in php, and we know that it can only be used in versions above php5.2. So today we will briefly introduce json_encode to us. The method of use is very simple and practical, and I recommend it to everyone.

1. Query the data from the database and put it in the array

$query=mysql_query($SQL);
 while($row = mysql_fetch_array($query)){         
 $xdata[]=$row['EventDate'];         
 $ydata[]=intval($row['data']);    
 }

2. Convert the data into json

$data_arr=array($xdata,$ydata）
json_encode($data_arr);

3. AJAX call data in HTML page

$.ajax({
type: "Get",   
   url: "columndata.php?r=" + Math.floor(Math.random() * 1000 + 1), 
   data: { 'BeginTime': "" + beginTime + "", "EndTime": "" + endTime + "" , "keyword": "" + keyword + "" },
   dataType: "text",   
   global: false,  
   async: false,   
   success: function (strReult) {
    if (strReult == "-1") { alert("fail!"); return; }
    var jsondata = eval("(" + strReult + ")");
       var xData = jsondata[0];                                
     var yData = jsondata[1];
       var namestr = jsondata[2];
   }, 
   error: function () {
    alert("fail!");
   }
  });

Summary:

Believe it through studying this article Everyone has a better understanding of how to use json_encode in php. I hope it will be helpful to your work!

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