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()){
$result=array(
'code'=>$code,
'message'=>$message,
'data'=>$data
);
//输出json
echo json_encode($result);
exit;
}
}
?>
Step 2: text.php, used to convert the data in the database into a json string and output:
<?php
require_once('conn.php');
/*
*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['id'];
if($id==1){
Response::json(1,'数据返回成功',$dataarr);
}else if($id==2){
Message::json(0,'失败');
}
?>
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>
Related recommendations:
getJSON() asynchronously requests the server to return json format data (graphic tutorial)
JSON object definition in JS Detailed explanation of the value implementation steps
Json-lib processing solution when using frameworks such as Ajax or Easyui (graphic tutorial)
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