php实现的CSS更新类实例_PHP教程

php实现的CSS更新类实例

 CSSUpdate.class.php类文件如下：

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/** 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." ";    }  }  ?>

demo示例程序如下:

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require_once "CSSUpdate.class.php";      define('ROOT_PATH', dirname(__FILE__));  $css_path = ROOT_PATH.'/css';  $csstmpl_path = ROOT_PATH.'/csstmpl';  $replacetags = array('.png', '.jpg', '.gif');      $cssobj = new CSSUpdate($csstmpl_path, $css_path, $replacetags);  $cssobj->update();  ?>

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