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……
<center><FONT SIZE=5 FACE=”‘georgia’,verdana,Arial,Lucida Sans,Gill Sans”>title “;
if (admin==1)
{
echo ” Admin “;
}
echo ” – News</font> </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><FONT SIZE=-2 FACE=”‘georgia’,verdana,Arial,Lucida Sans,Gill Sans”>All news</font></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><FONT SIZE=-2 FACE=”‘verdana’,Arial,Lucida Sans,Gill Sans”>show<br>cleannews</font</TD>
“;
}
echo ” “;
}
if (admin==1)
{
echo “<center><a href=admin/index.php><FONT SIZE=-2 FACE=”‘verdana’,Arial,Lucida Sans,Gill Sans”>返回</font></a></center>”;
}
if (link)
{
echo “<center><br><br>link</center>”;
}

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