Instance of CSS update class implemented by php

This article describes the example of php implementation of CSS update class and its usage, very practical. Share it for your reference. The details are as follows:

The CSSUpdate. class. php class files are as follows:

<?php 
/** css  Update class , Update css Version of the picture in the file  
*  Date:  2013-02-05 
*  Author: fdipzone 
*  Ver:  1.1 
* 
*  Func: 
*  update(); 
* 
*  Ver:  1.1  Increase search_child Parameter , You can traverse subfolders  
*/ 
 
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; 
 
  /**  Initialization  
  * @param String $csstmpl_path css Template path  
  * @param String $css_path   css Target path  
  * @param Array  $replacetags  Type of picture to be replaced  
  * @param boolean $search_child  Whether to traverse subfolders , Default false 
  */ 
  public function __construct($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; 
    } 
  } 
 
  /**  Update css Documents  */ 
  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); 
  } 
 
  /**  Traverse folders  
  * @param String $path  File path  
  */ 
  private function traversing($path){ 
    $handle = opendir($path); 
    while(($file=readdir($handle))!==false){ 
      if($file!='..' && $file!='.'){ 
        $curfile = $path.'/'.$file; 
         
        if(is_dir($curfile)){  // folder 
          if($this->search_child){  //  Need to traverse subfolders  
            $this->traversing($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); 
  } 
 
  /**  Check file suffix  */ 
  private function checkExt($file){ 
    $name = basename($file); 
    $namefrag = explode('.', $name); 
    if(count($namefrag)>=2){ 
      if(strtolower($namefrag[count($namefrag)-1])=='css'){ // css Documents  
        return true; 
      } 
    } 
    return false; 
  } 
 
  /**  Replace template content , Write csspath 
  * @param String $tmplfile  Template file  
  * @param String $dfile   Object file  
  */ 
  private function create($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))){  //  Generate target path  
      mkdir(dirname($dfile), 0755, true); 
    } 
    file_put_contents($dfile, $css_content, true); 
  } 
 
  /**  Output  */ 
  private function response($content){ 
    echo $content."<br>"; 
  } 
} 
?>

The demo sample program is as follows:

<?php 
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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I hope this article is helpful to everyone's study of PHP programming.