我们浏览一些网站的时候,往往看到一些新闻是刚刚更新不久的,如果要是人工维护的话,那会是一项非常繁琐的工作。然而,我们可以通过程序来控制实现更新操作,事情就会变得很方便了(我可不是要偷懒)。
在这里,我使用PHP来实现这一功能。其原理就是根据新闻发布的时间逆序排列好,然后在一页面显示新闻连接列表,每一个连接都对应一条新闻内容网页。具体操作如下:
一、首先,在你的站点下建立一个目录,将编辑好的新闻页都保存在此目录下,将来所有的新闻页都放入这里,方便维护。新闻页格式为超文本方式(可别说你还不会HTML),首行为“<HTML><HEAD><TITLE>新闻标题</TITLE></HEAD>”(原因随后解释,一定要在同一行啊!)。
二、编写程序,实现新闻自动更新功能(假设文件名为paixu.php)
源程序如下:
<?php
$fp=array("filename"=>"","filetime"=>"","firstline"=>"");//建立数组,保存文件名、文件首行
$dd=dir('新闻保存目录');//读取新闻文件的保存目录
$i=0;
clearstatcache();
while ($file=$dd->read())//循环读出目录中的文件
{
if(is_file($dd->path."/".$file))
{
$fp[$i]["filename"]=$dd->path."/".$file;//保存文件名
$fr=fopen($dd->path."/".$file,"r");
$fp[$i]["firstline"]=fgetss($fr,60);//去除HTML标记后保存文件首行(也就是为什么我们要把新闻页首行写成要求的格式)
fclose($fr);
if($time=date("Y m d H:i",filemtime($dd->path."/".$file)))//保存文件时间,以此作为排序条件
{
$fp[$i]["filetime"]=$time;
}
$i++;
}
}
$i=count($fp);//保存文件数
$i-=4;
for($j=0;$j<$i;$j++)//按照冒泡算法排序
for($k=$i;$k>$j;$k--)
if($fp[$j]["filetime"]<=$fp[$k]["filetime"])
{
$c=$fp[$j]["filetime"];
$fname=$fp[$j]["filename"];
$fcontent=$fp["$j"]["firstline"];
$fp[$j]["filetime"]=$fp[$k]["filetime"];
$fp[$j]["filename"]=$fp[$k]["filename"];
$fp[$j]["firstline"]=$fp[$k]["firstline"];
$fp[$k]["filetime"]=$c;//line30
$fp[$k]["filename"]=$fname;
$fp[$k]["firstline"]=$fcontent;
}
for($i=0;$i<=(count($fp)-4);$i++)//读取保存的文件信息,做好相应连接
{
echo "<tr><td>";
echo "<a href=".$fp[$i]["filename"].">".$fp[$i]["firstline"]."</a>";
echo "</td><td class=font1>";
echo "(".$fp[$i]["filetime"].")<br>\n";
echo"</td></tr>";
}
$dd->close();
?>
三、将程序和目录放到你的网站上,然后在浏览器敲入HTTP://网站名/目录/panxu.php,能看到吗?
本程序仅仅提供了基本的功能,你可以增加更多的控制功能,还有页面的修饰和美化等工作,就要靠你自己了。

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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