php CSS Update Class的相關內容講解

CSSUpdate.class.php

<?php/** css 更新類,更新css檔案內圖片的版本*Date: 2013-02-05*Author: fdipzone*Ver:1.1**Func:*update();**   Ver:    1.1 增加search_child參數,可遍曆子檔案夾*/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模版路徑    * @param String  $css_path     css目標路徑    * @param Array   $replacetags  需要替換的圖片類型    * @param boolean $search_child 是否遍曆子檔案夾,預設false    */    public function __construct($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;            $this->is_ready = 1;        }    }    /** 更新css檔案 */    public function update(){        if($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);    }    /** 遍曆檔案夾    * @param String $path 檔案路徑    */    private function traversing($path){        $handle = opendir($path);        while(($file=readdir($handle))!==false){            if($file!='..' && $file!='.'){                $curfile = $path.'/'.$file;                                if(is_dir($curfile)){   // folder                    if($this->search_child){    // 需要遍曆子檔案夾                        $this->traversing($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);    }    /** 檢查檔案尾碼 */    private function checkExt($file){        $name = basename($file);        $namefrag = explode('.', $name);        if(count($namefrag)>=2){            if(strtolower($namefrag[count($namefrag)-1])=='css'){ // css檔案                return true;            }        }        return false;    }    /** 替換模版內容,寫入csspath    * @param String $tmplfile 模版檔案    * @param String $dfile    目標檔案    */    private function create($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))){   // 產生目標路徑            mkdir(dirname($dfile), 0755, true);        }                file_put_contents($dfile, $css_content, true);    }    /** 輸出 */    private function response($content){        echo $content."<br>";    }}?>

demo:

<?phprequire_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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