swape.net » Scripts

Function Caching

admin — Thu, 05 Apr 2012 11:42:05 +0000

Many PHP caching systems like Vanish or others are great for less dynamic sites. I could not find any so I made my own.

But you should always use it when the output of the function do not change so much in caching time. And the output is just a text.

You can not use it if the function returns an array or object. But if it returns an array you can make another wrapper function to convert it from and to JSON instead of an array.

public function ccache($arrCallable ,$strFilename , $intTTL = ’10 min ago’ , $arrParameter = ”){
// custom cache by Alireza Balouch
$strReturn = ”;
$strCCpath = ‘/tmp/mem/’;
$strFile = $strCCpath . ‘ccache_’ . md5($_SERVER[‘REQUEST_URI’] . $strFilename );
if(file_exists($strFile) and filemtime($strFile) >= strtotime($intTTL) ){
$strReturn = file_get_contents($strFile);
}
else{
if(is_callable($arrCallable )){
if($arrParameter == ”){
$strReturn = call_user_func($arrCallable);
}else{
$strReturn = call_user_func_array($arrCallable , $arrParameter );
}
file_put_contents($strFile, $strReturn);
sf_tools::ccache_Clean(); // this should be from cron
}else{
$strReturn = ‘not callable’;
}
}
return $strReturn;
}
public function ccache_Clean(){
// mkdir mem
// mount -t ramfs -o size=250M ramfs /tmp/mem
// chown www-data mem
$strCCpath = ‘/tmp/mem/’;
$arrDir = scandir($strCCpath);
foreach($arrDir as $row){
if(substr($row, 0 ,1) == ‘.’ OR substr($row, 0 ,7) != ‘ccache_’ ){continue;} // skip the . and non ccache_
$strFile = $strCCpath . $row ;
if(filemtime($strFile) <= strtotime(’4 hour ago’) ){
exec(‘mv ‘ . $strFile . ‘ ‘ . $strCCpath . ‘old &’);
}
}
}

How it works

- First you have to put those 2 functions in a class. I have a utility class that I put all those small handy functions in.

- Now log in to your server and make a directory under /tmp called /tmp/mem/

- if you have lots of memory on your server you should mount ramfs to improve the speed. just use mount -t ramfs -o size=250M ramfs /tmp/mem . I assign 250Mb to that. but watch out to not to store bigger files there so it do not exceeds the limit.

- in my UBUNTU server, apache runs as www-data so I changing the owner to www-data. chown www-data /tmp/mem

Now we have set it up,so lets use it.

I have put those functions in my sf_tools class. So when I need to call up the caching system I use sf_tools::ccache(array($this , ‘functionName’) , $strUniqueCachName , ’10 min ago’ );

array($this , ‘functionName’) is the class function I want to cache. So normally I would call it like this $this->functionName()

The second parameter is the unique name for that function so we do not end up overwriting or using the wrong function cache output.

The third is the parameter that feeds the strtotime(). It tells it how long to store the cache. You can use sentences like “10 min ago” or “-1 hour” … check the function sepcs on php.net site. I don’t use more than 10 min by default.

The fourth parameter is the array of parameters to pass to that function that are being cached.

So if you normally call it like this: $this->myCoolFunction($intID,$strText);
, then the caching would be like this:

sf_tools::ccache(array($this , ‘myCoolFunction’) , ‘myCoolFunction’ . $intID . $strText , ’10 min ago’ , array($intID,$strText) );

I use this when I have to do lots of number crunching or when I getting data from other servers by API.

It is much faster and server can save those CPU and Disk resources for other things ;)

niceUpload

admin — Tue, 29 Mar 2011 19:23:53 +0000

NiceUpload is a jQuery plug ins that replace the normal file input and makes it much more prettier. You can adjust and tweak it with CSS if you want.

See the demo here: http://lab.swape.net/niceUpload.1.0/

niceUpload.1.0.zip

Multitag

admin — Tue, 29 Mar 2011 19:17:06 +0000

Multitag is a jQuery plug ins for making nice tag boxes.
Click on the box and start writing a tag names and then press the “,” (comma) or enter button to make a tag

See the demo here: http://lab.swape.net/multitag.1.0/

You can download the source from here https://github.com/swape/multitag

Swape Gallery Light

admin — Tue, 18 Aug 2009 19:40:20 +0000

SGL is a php5 script to list pictures. A fat way of making a galery and showing your pictures.

This script finds all the pictures in a directory under ./test_pic/ and makes menus based on directories.

All you have to do is putt your pictures in ./test_pic/ directory. Or edit $strPathToFiles = ‘./test_pic’; in sgl4.class.php file.

You can organize your pictures by category, by putting it under sub-directories.

The thumbs/ directory must be writable (CHMOD 755) to generate thumbnails automatically first time you visit the site. It will help loading your images faster.

HOW TO INSTALL

All you have to do is unzip the file.
Unpack the sgl4.php and configure the paths.

Putt your pictures under ./test_pic/ directory.
And don’t forget to chmod 755 thumbs directory.

SYSTEM REQUIRED.

Server with PHP5.

sgl4.zip

favicon2png

admin — Tue, 19 Feb 2008 20:22:21 +0000

Here is a script to download the favicon.ico files from a website and save it as a png file.

You must have imagemagick installed on your server to convert the ico file to png.

"?" method="post">
"site" name="site" type="text"
value="" />
"submit" />
< ?php
//— favicon2png by Alireza Balouch @ swape.net 2008
if($_POST[‘site’] != ”){
//finding the hostname
$host = parse_url($_POST[‘site’]);
$host = $host[‘host’];
$host = explode(‘.’ , $host);
$host = $host[count($host) -2];
$filename = ‘img/’ . $host . ‘.png’;
if (!is_file($filename)){
// getting the favicon
$handle = fopen( $_POST[‘site’] . ‘/favicon.ico’, "rb");
$contents = stream_get_contents($handle);
fclose($handle);
file_put_contents(‘fav.ico’ , $contents );
// converting to png
$StrExec = ‘/usr/local/bin/convert fav.ico -resize 24×24\> ‘ . $filename ;
$ret = exec($StrExec);
}
echo ‘ . $filename . ‘" />’ . $_POST[‘site’];
}
?>