Please help to improve my pHp cache?

PHP
1

Hello,
i have read a bit around in the internet about the php cache.
at the moment i am using, this system to cache my pages:

This is putted on the start of the page

<?php
    
        // Settings
        $cachedir = 'cache/'; // Directory to cache files in (keep outside web root)
        $cachetime = 600; // Seconds to cache files for
        $cacheext = 'html'; // Extension to give cached files (usually cache, htm, txt)
    
        // Ignore List
        $ignore_list = array(
            'addedbytes.com/rss.php',
            'addedbytes.com/search/'
        );
    
        // Script
        $page = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; // Requested page
        $cachefile = $cachedir . md5($page) . '.' . $cacheext; // Cache file to either load or create
    
        $ignore_page = false;
        for ($i = 0; $i < count($ignore_list); $i++) {
            $ignore_page = (strpos($page, $ignore_list[$i]) !== false) ? true : $ignore_page;
        }
    
        $cachefile_created = ((@file_exists($cachefile)) and ($ignore_page === false)) ? @filemtime($cachefile) : 0;
        @clearstatcache();
    
        // Show file from cache if still valid
        if (time() - $cachetime < $cachefile_created) {
    
            //ob_start('ob_gzhandler');
            @readfile($cachefile);
            //ob_end_flush();
            exit();
    
        }
    
        // If we're still here, we need to generate a cache file
    
        ob_start();
    
    ?>

MY HTML CODE Goes here …

and the code below is at the footer of my page.

<?php
    
        // Now the script has run, generate a new cache file
        $fp = @fopen($cachefile, 'w'); 
    
        // save the contents of output buffer to the file
        @fwrite($fp, ob_get_contents());
        @fclose($fp); 
    
        ob_end_flush(); 
    
    ?>

There are some things that i need and this code dont have them :

  • gzip
  • the expired cache is not autodeleted after it expire.

Also wanted to ask, if this code is secure to use , if some one can suggest a better one or something to improve the current code it will be just great

Thank you fro reading this post.
Best Regards
Meo

2

If $cachedir is outside of (above) your website doc root, then why do you need to give it an md5()ed name?

if the request /about.php resolves to:

users/me/mywebsite/about.php

Then why not fetch

users/me/mycache/about.php

Then there is no need to worry about deleting the files, they just overwrite themselves.

I am just wondering, is there an express reason you md5() the file name?

3

hello, thank your for the reply.
about the md5 i just copied this from another website, and i see that is working. but need some little modifications,

after reading a bit around i have added some things, below is the code :

<?php
    // Settings
    $cachedir = 'cache2/'; // Directory to cache files in (keep outside web root)
    $cachetime = 100; // Seconds to cache files for
    $cacheext = 'html'; // Extension to give cached files (usually cache, htm, txt)

    // Ignore List
    $ignore_list = array(
        'addedbytes.com/rss.php',
        'addedbytes.com/search/'
    );

    // Script
    $page = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; // Requested page
    $cachefile = $cachedir . md5($page) . '.' . $cacheext; // Cache file to either load or create

    $ignore_page = false;
    for ($i = 0; $i < count($ignore_list); $i++) {
        $ignore_page = (strpos($page, $ignore_list[$i]) !== false) ? true : $ignore_page;
    }

    $cachefile_created = ((@file_exists($cachefile)) and ($ignore_page === false)) ? @filemtime($cachefile) : 0;
    @clearstatcache();


	if (time() - $cachetime < $cachefile_created) {

    //ob_start('ob_gzhandler');
    echo gzuncompress(file_get_contents($cachefile));
    //ob_end_flush();
    exit();

  } else {
    if(file_exists($cachefile) && is_writable($cachefile)) unlink($cachefile);
   }
	
    // If we're still here, we need to generate a cache file

    ob_start();
?>

AT THE END OF PAGE


<?php
	 // Now the script has run, generate a new cache file
    $fp = @fopen($cachefile, 'w'); 

    // save the contents of output buffer to the file
    @fwrite($fp, gzcompress(ob_get_contents(), 9));
    @fclose($fp); 

    ob_end_flush(); 

?>

Is any thing wrong here ? i have added gzip function… too.

Thank you for looking into this.
Best Regards
AvinD

4

Right, so you haven’t written this code, you copied it and you want us to give you a hand to improve it for you?

5

yes if is possible.