private $csstmpl_path = null;
private $css_path = null;
private $replacetags = array();
private $search_child = false;
private $convert_num = 0;
private $is_ready = 0;

/** 初始化

• @param String $csstmpl_path css模版路径
• @param String $css_path css目标路径
• @param Array $replacetags 需要替换的图片类型
• @param boolean $search_child 是否遍历子文件夹,默认false
  */
  public function __construct($csstmpl_path,$css_path,$replacetags=array(),$search_child=false){
  if(!is_dir($csstmpl_path) || !is_dir($css_path) || !$replacetags){
  $this->is_ready = 0;
  }else{
  $this->csstmpl_path = $csstmpl_path;
  $this->css_path = $css_path;
  $this->replacetags = $replacetags;
  $this->search_child = $search_child;
  $this->is_ready = 1;
  }
  }

/* 更新css文件 /
public function update(){
if($this->is_ready==0){
$this->response('csstmpl or csspath or replacetags error');
return '';
}
$this->traversing($this->csstmpl_path);
$this->response('covert num:'.$this->convert_num);
}

/** 遍历文件夹

• @param String $path 文件路径
  */
  private function traversing($path){
  $handle = opendir($path);
  while(($file=readdir($handle))!==false){
  if($file!='..' && $file!='.'){
  $curfile = $path.'/'.$file;

  if(is_dir($curfile)){  // folder 
    if($this->search_child){  // 需要遍历子<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>夹 
      $this->traversing($curfile); 
    } 
  }elseif($this->checkExt($curfile)){ // css file 
    $dfile = str_replace($this->csstmpl_path,$this->css_path,$curfile); 
    $this->create($curfile,$dfile); 
    $this->response($curfile.' convert to '.$dfile.' success'); 
    $this->convert_num ++; 
  } 

  }
  }
  closedir($handle);
  }

/* 检查文件后缀 /
private function checkExt($file){
$name = basename($file);
$namefrag = explode('.',$name);
if(count($namefrag)>=2){
if(strtolower($namefrag[count($namefrag)-1])=='css'){ // css文件
return true;
}
}
return false;
}

/** 替换模版内容,写入csspath

• @param String $tmplfile 模版文件
• @param String $dfile 目标文件
  */
  private function create($tmplfile,$dfile){
  $css_content = file_get_contents($tmplfile);
  foreach($this->replacetags as $tag){
  $css_content = str_replace($tag,$tag."?".date('YmdHis'),$css_content);
  }
  if(!is_dir(dirname($dfile))){ // 生成目标路径
  mkdir(dirname($dfile),0755,true);
  }
  file_put_contents($dfile,$css_content,true);
  }

/* 输出 /
private function response($content){
echo $content."
";
}
}
?>

$cssobj = new CSSUpdate($csstmpl_path,$replacetags);
$cssobj->update();
?>