PHP+MySQL 制作简单的留言本

}
$conn=mysql_connect($host,$user,$password);
if($conn){
$sql_drop_database="DROP DATABASE IF EXISTS `".$database."`";
$sql_create_database="CREATE DATABASE `".$database."`";
$sql_create_table_messageboard="CREATE TABLE `messageboard` (
`id` int(11) NOT NULL auto_increment,
`author` varchar(15) NOT NULL,
`title` varchar(30) NOT NULL,
`smiles` varchar(30) NOT NULL,
`content` mediumtext,
`photo` varchar(30) NOT NULL,
`addtime` int(11) default NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk AUTO_INCREMENT=1";
$sql_create_table_reply="CREATE TABLE `reply` (
`id` int(11) NOT NULL auto_increment,
`msgid` int(11) NOT NULL,
`content` mediumtext,
`addtime` int(11) default NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk AUTO_INCREMENT=1";
if(mysql_query($sql_drop_database,$conn)){
if(mysql_query($sql_create_database,$conn)){
mysql_select_db($database,$conn);
if(mysql_query($sql_create_table_messageboard,$conn) && mysql_query($sql_create_table_reply,$conn)){
$config_file="../config.php";
$config_strings="<?phpn";
$config_strings.="$boardname="".$boardname."";n";
$config_strings.="$host="".$host."";n";
$config_strings.="$user="".$user."";n";
$config_strings.="$password="".$password."";n";
$config_strings.="$database="".$database."";n";
$config_strings.="$pagenum="".$pagenum."";n";
$config_strings.="$admin_name="".$admin_name."";n";
$config_strings.="$admin_password="".$admin_password."";n";
$config_strings.="$conn=mysql_connect($host,$user,$password);n";
$config_strings.="mysql_select_db($database,$conn);n";
$config_strings.="?>";
if($fp=fopen($config_file,"wb")){
if(fwrite($fp,$config_strings)){
if($fp2 = fopen($lockfile, 'w'))
{
fwrite($fp2,'1212');
fclose($fp2);
}
echo "安装成功！配置文件为：config.php，您可以手工修改该文件";
echo "n<a href='../index.php'>进入系统首页</a>";
}else{
exit("文件写入失败");
}
fclose($fp);
}
}else{
exit("不能执行CREATE TABLE语句：".$sql_create_table);
}
}else{
exit("不能执行CREATE DATABASE语句：".$sql_create_database);
}
}else{
exit("不能执行DROP DATABASE语句：".$sql_drop_database);
}
}else{
exit("连接数据库失败，请检查MySQL主机名、用户名和密码");
}
}

生成的config.php文件：

<?php
$boardname="RUIZHINET留言本";
$host="localhost";
$user="root";
$password="";
$database="ruizhi_messageboard";
$pagenum="10";
$admin_name="admin";
$admin_password="admin";
$conn=mysql_connect($host,$user,$password);
mysql_select_db($database,$conn);
?>

index.php：程序显示页面

<?php
if(!$_GET["page"]){
$page=1;
}else{
$page=$_GET["page"];
}
$sql="SELECT id FROM messageboard";