What does php static mean?

PHP staticization is to make the website-generated pages displayed in front of visitors in the form of static HTML; PHP staticization is divided into pure staticization and pseudo-staticization. The difference between the two lies in the different processing mechanisms for PHP to generate static pages. Pure staticization is to save the dynamic page generated by PHP into a static html file. The user accesses the static page instead of regenerating the same web page every time the user visits, which can reduce server overhead. Pseudo-static refers to converting the URL address of a dynamic page into a URL address similar to a static page to facilitate inclusion by search engines.

The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer

What is PHP staticization

The simple understanding of PHP static is to make the website-generated pages displayed in front of visitors in the form of static HTML. PHP static is divided into pure static and pseudo-static. The difference between the two is that PHP The processing mechanism for generating static pages is different.

Pure static: It saves the dynamic page generated by PHP into a static html file. The user accesses the static page instead of regenerating the same web page every time the user visits.

The advantage is to reduce server overhead.

If you subdivide pure static, it can be divided into "partial pure static" and "all pure static":

• Partial staticization: Is there partial data in the generated static file or is it obtained dynamically through ajax technology;

• Full staticization: That is, there is no dynamic acquisition of data , so the content comes from static html pages

Pseudo-static: refers to the process of converting the URL address of a dynamic page into a URL address similar to a static page

Pseudo-static is actually dynamic access. Its essence is to dynamically generate data. The URL you visit is similar to "http://yourhost,com/index/post/12", which is a static address. This address It is more common in blog addresses, but in pseudo-static mode, the URL you visit is actually parsed by the server and will still be parsed into an address similar to "http://yourhost,com/?c=index&a=post&id=12", so it is called It is pseudo-static

Advantages of pseudo-static: beautiful; easy for search engines to include

PHP pseudo-static: Use Apache mod_rewrite to implement URL rewriting.

Why make web pages static

1. Speed ​​up page opening and browsing speed. Static pages do not need to be connected to the database to open faster than dynamic ones. The page has been significantly improved;

2. It is conducive to search engine optimization (SEO). Baidu and Google will give priority to including static pages, which are not only included quickly but also included completely;

3. Reduce the load on the server , browsing web pages does not require calling the system database;

4. The website is more secure, and HTML pages will not be affected by PHP-related vulnerabilities; Take a look at the larger websites, which are basically static pages, and can reduce attacks and prevent SQL injection.

When a database error occurs, normal access to the website will not be affected.

Although the operation of generating html articles is more troublesome and the procedures are more complicated, in order to be more convenient for search, faster and safer, these sacrifices are still worth it.

How to generate static HTML pages in PHP

Use PHP templates to generate static pages

PHP It is very convenient to make templates static. For example, you can install and use PHP Smarty to make your website static. You can also write your own set of template parsing rules. Common template rules can imitate various CMS templates.

1. Use PHP file reading and writing functions and ob caching mechanism to generate static pages

For example, the address of the dynamic details page of a product is: http://xxx.com?goods.php? gid=112

So here we read the content of this details page once based on this address, and then save it as a static page. The next time someone visits the dynamic address of this product details page, we can

Directly output the corresponding static content file that has been generated.

<?php
$gid = $_GET [ &#39;gid&#39; ]+0; //商品id
$goods_statis_file = "goods_file_" . $gid . ".html" ; //对应静态页文件
$expr = 3600*24*10; //静态文件有效期，十天
if ( file_exists ( $goods_statis_file )){
   $file_ctime = filectime ( $goods_statis_file ); //文件创建时间
      if ( $file_ctime + $expr -->time()){ //如果没过期
       echo file_get_contents ( $goods_statis_file ); //输出静态文件内容
          exit ;
      } else { //如果已过期
          unlink( $goods_statis_file ); //删除过期的静态页文件
          ob_start();
  
             //从数据库读取数据，并赋值给相关变量
  
             //include ("xxx.html");//加载对应的商品详情页模板
  
             $content = ob_get_contents(); //把详情页内容赋值给$content变量
             file_put_contents ( $goods_statis_file , $content ); //写入内容到对应静态文件中
             ob_end_flush(); //输出商品详情页信息
      }
} else {
  ob_start();
  
  //从数据库读取数据，并赋值给相关变量
  
  //include ("xxx.html");//加载对应的商品详情页模板
  
  $content = ob_get_contents(); //把详情页内容赋值给$content变量
  file_put_contents ( $goods_statis_file , $content ); //写入内容到对应静态文件中
  ob_end_flush(); //输出商品详情页信息
  
}
  
?>

2. Use nosql to read content from memory (in fact, this is not static but cache);

Take memcache as an example ：

<?php
$gid = $_GET [ &#39;gid&#39; ]+0; //商品id
$goods_statis_content = "goods_content_" . $gid ; //对应键
$expr = 3600*24*10; //有效期，十天
  
$mem = new Memcache;
$mem --->connect( &#39;memcache_host&#39; , 11211);
  
$mem_goods_content = $mem ->get( $goods_statis_content );
  
  
  
if ( $mem_goods_content ){
   echo $mem_goods_content ;
} else {
  ob_start();
  
  //从数据库读取数据，并赋值给相关变量
  
  //include ("xxx.html");//加载对应的商品详情页模板
  
  $content = ob_get_contents(); //把详情页内容赋值给$content变量
  $mem ->add( $goods_statis_content , $content , false, $expr );
  ob_end_flush(); //输出商品详情页信息
  
}
  
?>

Memcached has a one-to-one correspondence between key and value. The default maximum key size cannot exceed 128 bytes, and the default size of value is 1M. Therefore, the 1M size can meet the storage needs of most web pages.

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