PHP processing Static page: Page Setup cache time graphic detailed

This article mainly introduces the PHP processing static page: Page Setup cache time graphic detailed, interested friends reference, I hope to help you.

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

1. Page Add cache time

2. How to trigger manually

3.crontab timed Scan Program

Let's implement scenario one: Add cache time to page

User Request page =/page is out of date = = no (get static page) | | = = (Dynamic page generates a new static page)

if (if there is this static file && not expired) {  //Get page}else{  //Regenerate a copy of static page}

OK, the basic logic is this, the following we refine the code:

<?phpif (Is_file ('./index.html ') && (Time ()-filemtime ('./index.html ') <) {   //assuming the cache is 60 seconds//  Get page  require_once ('./index.html ');} else{  //Regenerate a copy  of the static page//prepare the data to be displayed to the Web  $data = Array (     ' id ' =>1, ' msg ' = ' Hello java '),    Array (' ID ' =>2, ' msg ' = ' Hello php '),    array (' ID ' =>3, ' msg ' = ' Hello python '),  );  Render to template  //actual project is usually rendered in HTML//  demo here want to read  Ob_start ();//Start Input buffer control  foreach ($data as $item) {    echo $item [' id ']. ' ===> '. $item [' msg ']. ' <br/> ';  }  Start generating a static paging file  file_put_contents (' index.html ', ob_get_contents ());}

This way we access index.php, if the static file cache does not expire, its substance accesses the content from index.html this static file.