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                ## php寫app接口并返回json數據的實例 > 第一步:conn.PHP文件,用于連接數據庫并定義接口格式,代碼如下: ~~~ <?php header("charset=utf-8"); $servername="localhost"; $username="root"; $password="root"; $dbname="test"; $conn = mysql_connect($servername,$username,$password); if(!$conn){ echo "數據庫連接失敗!"; } mysql_select_db($dbname); class Response{ public static function json($code,$message="",$data=array()){ $result=array( 'code'=>$code, 'message'=>$message, 'data'=>$data ); //輸出json echo json_encode($result); exit; } } ?> ~~~ > 第二步:text.php,用于將數據庫中的數據轉化為json字符串,并輸出: ~~~ <?php require_once('conn.php'); /* *選擇數據表 * */ $sqla = "SELECT * from user"; $result = mysql_query($sqla,$conn); $dataarr = array(); while($row = mysql_fetch_array($result)){ $dataarr[]=$row; } $id=$_GET['id']; if($id==1){ Response::json(1,'數據返回成功',$dataarr); }else if($id==2){ Message::json(0,'失敗'); } ?> ~~~ > 第三步:text.html,ajax加載json數據并顯示: ~~~ <!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" /> <div id="tex"></div> <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;">將json字符串轉化為json對象</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> ~~~ 這樣就可以實現利用php寫json接口了。 以上這篇php寫app接口并返回json數據的實例(分享)就是小編分享給大家的全部內容了,希望能給大家一個參考 重點:php json_encode出來的是json字符串,并非json對象 服務器端使用php+ajax調用返回json對象。 ~~~ php <?php $result = array('Status' => false, 'Message' => 'sss'); $jsonstring = json_encode($result); header('Content-Type: application/json'); //前面代碼容易找到 echo $jsonstring; ?> javascript $.ajax({ url:'leaveword.action.php', type:"POST", data:param, success:function(phpData){ if(phpData.Status){ frmleave.filter('input').val(''); }else{ alert(phpData.Message); } } }); ~~~
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