PHP開發留言板教學之添加留言
下面我們來看以下html程式碼:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>留言板</title> <style type="text/css"> *{margin:0px;padding:0px;} body{background:#eee;} #bdy{width:414px;height:736px;margin:0 auto;margin-top:20px; background:#66CDAA; } #top{font-family:"隶书";font-size:30px;text-align:center;/*margin-top:18px;*/ color:#f60;} .a{text-decoration:none;color:#fff;float:right;padding-right:15px;} .a:hover{color:red;} #cont{width:414px;height:736px;margin:0 auto;margin-top:20px;} #left{width:350px;height:300px;margin-top:80px;margin-left:15px;/*float:left;*/ background:#48D1CC;padding-left:5px;} #right{width:360px;height:200px;margin-top:20px;background:#48D1CC; margin-left:15px;/*float:left;*/} h5{text-align:center;margin-top:15px;margin-bottom:20px;} #sub{width:120px;height:25px;margin-top:15px;} #sub:hover{background:#AFEEEE;} .span{font-size:18px;color:red;font-weight:bold;} table{width:360px;margin:0 auto;margin-top:15px;border:1px solid #eee;} td{text-align:center;} #td a{text-decoration:none;color:#eee;} #td a:hover{color:red;} </style> </head> <body> <div id="bdy"> <div id="top">留言板</div> <a href="login.php" class="a">登录</a> <a href="reg.php" class="a">注册</a> <div id="cont"> <div id="left"> <h5>写留言</h5> <form method="post" action="addmessage.php"> 标题:<input type="text" placeholder="请输入标题" name="title"> </br></br> 内容:<textarea cols="40" rows="5" name="content"></textarea> </br></br> <input type="submit" value="添加留言" id="sub"> </form> </div> <div id="right"></div> </div> </div> </body> </html>
表單提交到addmessage.php,下面我們具體來看以下addmessage.php檔案
首先也要開啟session
session_start();
註:此時開啟seession 為了後面我們進行判斷,如果登入了,即可留言,反之,不可留言
引入連接資料庫檔案conn .php
require_once('conn.php');
設定字元編碼
header("Content-type: text/html; charset=utf-8") ;//設定編碼
下面我們要取得表單的資訊
$title = $_POST['title'];
$content = $_POST['content'];
$messtime = time();
接下來我們要進行新增留言的動作了
如果沒有填寫標題和內容,我們應該不讓他提交
if(empty($title)){
echo "<script>alert('請輸入標題');history.go(-1);</script>";
(empty($content)){
echo "<script>alert('請輸入內容');history.go(-1);</script>";
}
否則的話,就應該可以加,如下程式碼:
if(!empty($_SESSION['name'])){
$sql = "insert into mess (title,content,messtime)title,content,messtime) values('$title','$content','$messtime')";
$result =mysql_query($sql);
echo "<script>alert ('新增留言成功');location.href='message.php';</script>";
}else{
.go(-1);</script>";
}
}else{
);</script>";
}
完整程式碼如下:
<?php session_start(); header("Content-type: text/html; charset=utf-8");//设置编码 require_once('conn.php'); $title = $_POST['title']; $content = $_POST['content']; $messtime = time(); if(empty($title)){ echo "<script>alert('请输入标题');history.go(-1);</script>"; }elseif(empty($content)){ echo "<script>alert('请输入内容');history.go(-1);</script>"; }else{ if(!empty($_SESSION['name'])){ $sql = "insert into mess (title,content,messtime) values('$title','$content','$messtime')"; $result =mysql_query($sql); if($result){ echo "<script>alert('添加留言成功');location.href='message.php';</script>"; }else{ echo "<script>alert('添加留言失败');history.go(-1);</script>"; } }else{ echo "<script>alert('请登录后添加留言');history.go(-1);</script>"; } } ?>
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