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php与mysql留言板程序实现代码

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Jun 08, 2016 pm 05:24 PM

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本程序仅供php+mysql爱好者学习测试用，测试过程中，可能会出现错误，请朋友们根据错误提示修改本程序，本程序为安装版，先运行install目录，然后根据提示操作！

关于PHP语法的那些就不说了，我就说一下连接mysql吧！

代码如下	复制代码
$conn =@mysql_connect("localhost","root","mydown") or die("数据库链接错误"); mysql_select_db("bbs", $conn); mysql_query("set names 'GBK'");

第一句就是描述了连接数据库的语句，并且如果失败的提示”数据库连接错误“；前面的三个参数分别代表了数据库地址localhost，数据库用户名root，连接数据库密码mydown；

第二句就是描述了连接到数据库表bbs，后面的$conn代表哪个数据库。

第三句话就是转换编码格式，显示中文。

连接好了数据库之后，我们来看下数据库语句怎么在PHP中提交运行！

代码如下	复制代码
$sql="INSERT INTO message (id,user,title,content,lastdate) values ('','$_POST[user]','$_POST[title]','$_POST[content]',now())"; mysql_query($sql);

上面中的蓝色字体大家应该面熟，意思就是在数据库中插入信息。第二句是在数据库中运行该语句。想起中类似$_POST[title]的变量，大家应该知道，这是通过网页提交获取的信息

实例

install安装

代码如下

复制代码

留言板安装

check_install.php

代码如下

复制代码

//获取提交的数据库值
$llcc_server=$_POST['llcc_server'];
$llcc_user_name=$_POST['llcc_user_name'];
$llcc_user_pass=$_POST['llcc_user_pass'];
$llcc_data_name=$_POST['llcc_data_name'];
//打开数据库配置文件
$fp=fopen("../config.php",'w');

if (!$fp) {
echo "sorry,try again!";
}
//写入文件内容
$outconfig=" $outconfig.='$server=';
$outconfig.="".$llcc_server.";//数据库所在IP，如果是本地，默认localhostn";
$outconfig.='$server_name=';
$outconfig.="".$llcc_user_name.";//连接数据库用户名，一般为rootn";
$outconfig.='$server_pass=';
$outconfig.="".$llcc_user_pass.";//连接数据库密码。n";
$outconfig.='$server_data=';
$outconfig.="".$llcc_data_name.";//数据库名n";
$outconfig.="?>";
$fw=fwrite($fp,$outconfig);

if ($fw) {
echo "

安装完成！请手动删除目录下install文件夹
返回首页 ";
}

代码如下

复制代码

include("header.php");
include("conn.php");

if($_GET[out]){
setcookie("cookie", "out");
echo "";
}

if($_POST[id]=='admin'){
    $pw=md5($_POST[pw]);
    if($pw=='1b3ae77a2e06580c8cb57e112ddc4a26'){
     setcookie("cookie", "ok");
       echo "";
    }
}
if($_COOKIE['cookie']!='ok'){
?>

登录名：
密码：

}else{
?>
退出
if($_GET[sub]=="清空数据库")
{
$sql="delete from message";
$query=mysql_query($sql);
}
?>
}
?>

conn.php数据库连接

代码如下	复制代码
include("config.php"); $conn =@mysql_connect($server,$server_name,$server_pass) or die("数据库链接错误"); mysql_select_db($server_data, $conn);//此处代表的要打开的数据库名称，"bbs"是我的数据库名，修改成自己的！ mysql_query("set names 'GBK'"); //使用GBK中文编码; ?>

index.php文件

代码如下

复制代码

include("conn.php");
include("header.php");
?>
自由屋留言板

$sql="select * from message order by id DESC";
$query=mysql_query($sql);
while($row=mysql_fetch_array($query)){
?>

}
?>

用户名： 标题： 发表时间：

内容：

add.php增加留方程序

代码如下

复制代码

include("header.php");
include("conn.php");
if($_POST["submit"])
{
$sql="INSERT INTO message (id,user,title,content,lastdate) values ('','$_POST[user]','$_POST[title]','$_POST[content]',now())";
mysql_query($sql);
echo "留言已提交";
};
?>

用户：
标题：
内容：

test.php数据库结构

代码如下	复制代码
include("config.php"); include("conn.php"); $sql="CREATE TABLE `message` ( `id` tinyint(1) NOT NULL auto_increment, `user` varchar(25) NOT NULL, `title` varchar(50) NOT NULL, `content` tinytext NOT NULL, `lastdate` date NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=gbk AUTO_INCREMENT=1 ;"; $query=mysql_query($sql); if($query){ echo"执行成功";} else echo"执行失败!"; ?>

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