【PHP-性能调优】合并JavaScript和CSS文件。可以尽量减少HTTP请求和节省页面加载时间的好建议是：合并你的CSS和JS文件。虽然我更建议大家使用专用插件（例如minify），但使用...

function combine_my_files($array_files, $destination_dir, $dest_file_name){
 if(!is_file($destination_dir . $dest_file_name)){ //continue only if file doesn't exist
 $content = "";
 foreach ($array_files as $file){ //loop through array list
 $content .= file_get_contents($file); //read each file
 }
 //You can use some sort of minifier here
 //minify_my_js($content);
 $new_file = fopen($destination_dir . $dest_file_name, "w" ); //open file for writing
 fwrite($new_file , $content); //write to destination
 fclose($new_file);
 return '<script src="'. $destination_dir . $dest_file_name.'"></script>'; //output combined file
 }else{
 //use stored file
 return '<script src="'. $destination_dir . $dest_file_name.'"></script>'; //output combine file
 }
}

//用法是这样的：
$files = array(
 'http://example/files/sample_js_file_1.js',
 'http://example/files/sample_js_file_2.js',
 'http://example/files/beautyquote_functions.js',
 'http://example/files/crop.js',
 'http://example/files/jquery.autosize.min.js',
 );
echo combine_my_files($files, 'minified_files/', md5("my_mini_file").".js");