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><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