使用PHP制作新闻系统的思路

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......
<center>$title ";
if ($admin==1)
 {

 echo " Admin ";
 }

echo " - News
</td></tr>
";

$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
 {

 $link="<a href=$REQUEST_URL?show_news_sub=ALL>All news</a>";


 $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));


<TD align=left>$show $cleannews</font</TD>

";
}
echo "

";



 }
if ($admin==1)
{
echo "
<center><a href=admin/index.php>返回</a></center>
";
}

if ($link)
 {

补充：Web开发 , php ,