PHP processing static pages: Detailed graphic and text explanation of page setting cache time

This article mainly introduces PHP to process static pages: page setting cache time detailed graphic and text explanation, interested friends can refer to it, I hope it will be helpful to everyone.

Q: How to trigger the system to generate a purely static page?

1. Add cache time to the page

2. Manual triggering method

3.crontab scheduled scanner

Let’s implement option 1: add cache time to the page

User request page => Whether the page has expired => => No (get static page) || =>Yes (the dynamic page generates a new static page)

if( 如果存在这个静态文件 && 没有过期){
  // 获取页面
}else{
  // 重新生成一份静态页面
}

ok, the basic logic is like this, let’s improve the code below ：

<?php

if(is_file(&#39;./index.html&#39;) && (time()-filemtime(&#39;./index.html&#39;)) < 60){ 
  // 假设缓存时间是60秒
  // 获取页面
  require_once(&#39;./index.html&#39;);
}else{
  // 重新生成一份静态页面
  // 准备要展示到网页的数据
  $data = array( 
    array(&#39;id&#39;=>1,&#39;msg&#39;=>&#39;hello java&#39;),
    array(&#39;id&#39;=>2,&#39;msg&#39;=>&#39;hello php&#39;),
    array(&#39;id&#39;=>3,&#39;msg&#39;=>&#39;hello python&#39;),
  );

  // 渲染到模板
  // 实际项目一般是在html里渲染
  // 这里演示 希望能看懂

  ob_start(); // 开始输入缓冲控制

  foreach($data as $item){
    echo $item[&#39;id&#39;].&#39;===>&#39;.$item[&#39;msg&#39;].&#39;<br/>&#39;;
  }

  // 开始生成静态页面文件
  file_put_contents(&#39;index.html&#39;,ob_get_contents());
}

In this way, when we access index.php, if the static file cache has not expired, the actual accessed content comes from the static file index.html.

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