PHP技巧：分析利用PHP制作新闻系统的步骤

我们可以用新闻系统来存储新闻，我们可以对新闻进行添加、删除等操作，这样减少了大家的工作量，为什么不实验一下。

首先，建立一个表。

create table news (
n_id int(255) not null auto_increment,
n_date datetime not null,
news text not null,
primary key(n_id)
);

第二步，设置你的登陆信息

$database_user_name="root";
$database_password="";
$database_name="news";
$time_offset="0";

第三步，让我们把后面程序用到的东西作成函数，节省篇幅啊！

function connect_db()
{
// connects to the database
global $database_user_name, $database_password;
$db=mysql_connect("localhost",$database_user_name,$database_password);
return $db;
}
function db_name()
{
// returns the name of the database
global $database_name;
$db_name=$database_name;
return $db_name;
}
function get_now()
{
// gets current date and time
$db=connect_db();
$db_name=db_name();
mysql_select_db($db_name,$db);
$sql="select now() as now";
$result=mysql_query($sql,$db);
$myrow=mysql_fetch_array($result);
$now=$myrow["now"];
return $now;
}

第四步，让我们考虑如何将新闻显示出来

//上面已经定义的函数库...
//表格的定义......

$title ";
if ($admin==1)
{
echo " Admin ";
}
echo " - News ";
$db=connect_db();
$db_name=db_name();
mysql_select_db($db_name,$db);
if ($show_news_sub)
{
$show_news = $show_news_sub;
}
if (!ereg("([0-9]{".strlen($show_news)."})",$show_news))
{
$show_news="ALL";
}
if (strtoupper($show_news)=="ALL")
{
$sql="select date_format(n_date,'%m/%d/%Y') as n_date, date_format(n_date,'%H:%i') as n_time ,news , n_date as date from news order by date desc";
}
else
{
$link="All news";
$sql="select date_format(n_date,'%m/%d/%Y') as n_date, date_format(n_date,'%H:%i') as n_time , news , n_date as date from news order by n_date desc limit $show_news";
}
$result=mysql_query($sql,$db);
$num_rows=mysql_num_rows($result);
if($num_rows!=0)
{
echo " ";
while($myrow=mysql_fetch_array($result))
{
$date=$myrow["n_date"];
$time=$myrow["n_time"];
$news=$myrow["news"];
$n_id=$myrow["n_id"];
if (strtoupper($show_date)=="Y" && strtoupper($show_time)=="Y")
{
$show=$date." ".$time;
}
else if (strtoupper($show_date)=="Y" && strtoupper($show_time)!="Y")
{
$show=$date;
}
if (strtoupper($show_date)!="Y" && strtoupper($show_time)=="Y")
{
$show=$time;
}
$cleannews=(nl2br($news));
$show
$cleannews
";
}
echo " ";
}
if ($admin==1)
{
echo "返回";
}
if ($link)
{
echo "

$link";
}

说明：省略了格式方面的标签，这样看起来思路清晰些，你可要加上啊