?? PHP? JSON ???? ?? ???? server.php ??? ???????.

??? ??? ????

<?php
header("Content-type:text/html;charset=utf-8");    //設(shè)置編碼
$conn=mysqli_connect("localhost","root","root","comments");
mysqli_set_charset($conn,"utf8");
$sql="SELECT * from comments";
$que=mysqli_query($conn,$sql);
while($row=mysqli_fetch_array($que)){
      $comments[] = array("id"=>$row[id],"user"=>$row[user],"comment"=>$row[comment],"addtime"=>$row[addtime]);
}
echo json_encode($comments);
?>

??: json_encode ??? ????? PHP ??? 5.2 ????? ???.

comments.php ??

comment.php? ??? ??? ajax?? ??? ??? ? ?? ??? ????? ???? ????? ???? ??? ? ???? ??????? ?????. ?? 1, ??? ?? ????? jQuery? ?????.

<?php
header("Content-type:text/html;charset=utf-8");    //設(shè)置編碼
$user = htmlspecialchars(trim($_POST['user']));
$txt = htmlspecialchars(trim($_POST['txt']));
$time = date("Y-m-d H:i:s");
if(empty($user)){
   echo "昵稱不能為空！";
   exit;
}
if(empty($txt)){
   echo "評(píng)論內(nèi)容不能為空！";
   exit;
}
$conn=mysqli_connect("localhost","root","root","comments");
mysqli_set_charset($conn,"utf8");
$sql="insert into comments(user,comment,addtime)values('$user','$txt','$time')";
$que=mysqli_query($conn,$sql);
if($que)  echo "1";
?>

HTML ???? PHP ??? ???? ?? ??? ??? ? ????.

? ??? ???? ?? ??? ???? ??? ???? jQuery ??? ?????. ?? ??? ?? PHP? ajax ?? ????? ?? ????. jQuery? ?? ??? ??? ? ???? ??? ?? ? ????.