PHP implementation timed generation HTML Web site home

In order to improve the speed of the Web site, we often use to generate a static way to achieve, so that the site is really a lot of access to improve the speed. But there are some limitations to the timing generation, if you have a stand-alone server that can set up scheduled tasks on the server, However, if you are using a virtual host can be difficult to do. Although there are many ways. But it's easy to use, I think it's better to judge the difference between the generation time of the first file that has been generated and the time available, and it's easier to start generating this method if you meet a value. Don't say much.

Before you start, mention three functions: "Ob_start (), Ob_end_clean (), ob_get_contents ()"

Ob_start (): is to open the buffer, that is, you need to generate the contents of the static file cache here;
Ob_get_contents (): is read out of the buffer in the content, the following code for example;
Ob_end_clean (): This is more important, only after using this function, the contents of the buffer will be read out;

if (File_exists ("./index.htm"))//See whether the static index.htm file exists
{
$time =time ();

File modification time and current time difference? If so, direct the HTM file, or regenerate HTM
if ($time-filemtime ("./index.htm") < 600)
{
Header ("location:classhtml/main.htm");

}
}

Add Ob_start () at the beginning of your service;
Ob_start ();

Home content, is your dynamic part of the

Add Ob_end_clean () at the end and output this page to a variable
$temp =ob_get_contents ();
Ob_end_clean ();

Write to File
$FP =fopen ("./index.htm", ' W ');
Fwrite ($FP, $temp) or Die (' Write file error ');
echo "Generate HTML Finish!" ";