Combo Script automatically merges/compresses scripts imitating Taobao

Combo Script automatically merges/compresses scripts
Complete code download: http://www.ctdisk.com/file/9402163

Script usage:
- Requires php5 and above
- If the program cannot find a local file, it will go to the specified cdn to find the file with the same name.
- The program will automatically escape the -min file as a source file, so it is agreed that the -min file and the original file must appear in pairs
- Need to define the $YOUR_CDN variable in combo.php and minify.php
- If you just merge and compress local files, you don’t have to reset the $YOUR_CDN variable
- cb.php is provided here to simulate the development environment of tbcdn. The configuration of apache is in cb.php

Merge files
- http://yourdomain.com/combo.php?app/js/1.js&app/js/2.js

Merge and compress
- http://yourdomain.com/minify.php?app/js/1.js&app/js/2.js

Simulate Taobao CDN
- http://a.tbcdn.cn/??1.js,2.js
- http://a.tbcdn.cn/subdir/??1/js,2.js

File list:
- combo.php combines files without compression
- minify.php merges compressed files
- cssmin.php compress css
- jsmin.php compresses js
- cb.php Simulation of Taobao CDN file merging strategy

css example

js example

PHP file encoding uses utf-8 uniformly

/* Compression*/
$MINIFY = true;
/* Default cdn address*/
$YOUR_CDN = 'http://a.tbcdn.cn/';

require 'jsmin .php';
require 'cssmin.php';
/**
 * set e-tag cache
*/
function cache($etag){
 $etag = $etag; //Tag string, can be modified at will
 if ($_SERVER ['HTTP_IF_NONE_MATCH'] == $etag){
 header('Etag:'.$etag,true,304);
 exit;
 }
 else header('Etag:'.$etag);
}

function get_contents($url){
 $ch =curl_init($url);
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 $str =curl_exec($ch);
 curl_close ($ch);
 if ($str !==false) {
 return $str;
 }else {
 return '';
 }
}

//Get the extension
function get_extend($file_name) {
 $extend =explode("." , $file_name);
 $va=count($extend)-1;
 return $extend[$va];
}

/**
 * logic begin
*/
$files = array();
//Various possible file types that exist on cdn
$header = array(
 'js' => 'Content-Type: application/x-javascript',
 'css' => ' Content-Type: text/css',
 'jpg' => 'Content-Type: image/jpg',
 'gif' => 'Content-Type: image/gif',
 'png' => 'Content-Type: image/png',
 'jpeg' => 'Content-Type: image/jpeg',
 'swf' => 'Content-Type: application/x-shockwave-flash'
);
$type = '';
foreach ($_GET as $k => $v) {
 //The most common replacement rules
 $k = preg_replace(
 array('/_(js|css|gif|png |jpg|jpeg|swf)$/','/yui/2_8_0r4/','/yui/3_0_0/','/(d+)_(d+)_(d+)/','/(d+)_( d+)/','/_v(d)/'),
 array('.$1','yui/2.8.0r4','yui/3.0.0','$1.$2.$3','$1. $2','.v$1'),
 trim($k,'/')
 );
 //Add various cases of excessive conversion here
 $k = str_replace('global.v5.css',' global_v5.css',$k);
 $k = str_replace('detail.v2.css','detail_v2.css',$k);
 $k = str_replace('cubee_combo','cubee.combo',$ k);

 if(empty($type)) {
 $type = get_extend($k);
 }
 //The file exists
 if(file_exists($k)) {
 $in_str = file_get_contents($k) ;
 //Process text
 if(preg_match('/js|css/',$type)){
 //$files[] = file_get_contents($k);
 if($MINIFY == true && $type = = 'js'){
 $files[] = JSMin::minify($in_str);
 }else if($MINIFY == true && $type == 'css'){
 $files[] = cssmin:: minify($in_str);
 }else{
 $files[] = $in_str;
 }
 }else{
 //Processing non-text
 $files[] = array($in_str);
 }
 }else{
 //The file does not exist
 $in_sta = file($YOUR_CDN.$k);
 //Text processing
 if(preg_match('/js|css/',$type)){
 $files[] = '/ * http://a.tbcdn.cn/'.$k.' */';
 $inner_str = join('',$in_sta);
 if($MINIFY == true && $type == 'js' ){
 $files[] = JSMin::minify($inner_str);
 }else if($MINIFY == true && $type == 'css'){
 $files[] = cssmin::minify($inner_str );
 }else{
 $files[] = $inner_str;
 }
 }else{
 //Non-text processing
 $files[] = $in_sta;
 }
 }
}

header("Expires: " . date("D, j M Y H:i:s", strtotime("now + 10 years")) ." GMT");
//Text processing
header($header[$type]);// File type
if(preg_match('/js|css/',$type)){
 $result = join("",$files);
}else{
 //Non-text processing
 $result = join( "",$files[0]);
}
cache(md5($result));//etag, is it redundant to process Etag?
echo $result;
?>