php实现的CSS更新类实例

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<?php 

/** css 更新类,更新css文件内图片的版本 

*  Date:  2013-02-05 

*  Author: fdipzone 

*  Ver:  1.1 

* 

*  Func: 

*  update(); 

* 

*  Ver:  1.1 增加search_child参数,可遍历子文件夹 

*/ 

class CSSUpdate{ 

  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){  // 需要遍历子文件夹 

            $this->traversing($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."<br>"; 

  } 

} 

?>