PHP method to implement app interface and return json data-PHP Tutorial-php.cn

PHP method to implement app interface and return json data

墨辰丷

Release： 2023-03-27 12:32:02

Original

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This article mainly introduces the method of php implementing the app interface and returning json data. Interested friends can refer to it. I hope it will be helpful to everyone.

Step one: conn.PHP file, used to connect database and define the interface format, the code is as follows ：

<?php 
 header("charset=utf-8"); 
 $servername="localhost"; 
 $username="root"; 
 $password="root"; 
 $dbname="test"; 
 $conn = mysql_connect($servername,$username,$password); 
 if(!$conn){ 
  echo "数据库连接失败！"; 
 } 
 mysql_select_db($dbname); 
 class Response{ 
  public static function json($code,$message="",$data=array()){ 
   $result=array( 
    &#39;code&#39;=>$code, 
    &#39;message&#39;=>$message, 
    &#39;data&#39;=>$data 
   ); 
   //输出json 
   echo json_encode($result); 
   exit; 
  } 
 } 
 
?>

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Step 2: text.php, used to convert the data in the database into a json string and output:

<?php 
 require_once(&#39;conn.php&#39;); 
 /* 
  *选择数据表 
  * */ 
 $sqla = "SELECT * from user"; 
 $result = mysql_query($sqla,$conn); 
 $dataarr = array(); 
 while($row = mysql_fetch_array($result)){ 
  $dataarr[]=$row; 
 } 
 $id=$_GET[&#39;id&#39;]; 
 if($id==1){ 
  Response::json(1,&#39;数据返回成功&#39;,$dataarr); 
 }else if($id==2){ 
  Message::json(0,&#39;失败&#39;); 
 } 
  
?>

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The third step: text.html, ajax loads json data and displays:

<!DOCTYPE html> 
<html> 
 <head> 
  <meta charset="UTF-8"> 
  <title></title> 
  <script src="jquery/2.0.0/jquery.min.js"></script> 
 </head> 
 <body> 
  <input id="text" type="text"/> 
  <input type="button" id="tijiao" value="提交" /> 
  <p id="tex"></p> 
  <script type="text/javascript"> 
   $("#tijiao").click(function(){ 
    var data={"id":$("#text").val()} 
    $.get("text.php?flag=showmessage",data,function(res){ 
     res=JSON.parse(res);//<span style="color:#cc0000;">将json字符串转化为json对象</span> 
     if(res.code==1){ 
      $("#tex").empty(); 
      $.each(res.data, function(x,y) { 
       $("#tex").append("id:"+y.id+"/姓名:"+y.username+"<br>"); 
      }); 
     } 
    }) 
   }) 
    
  </script> 
 </body> 
</html>

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