php正则替换处理HTML页面的方法

<?php
if(!defined(BASEPATH)) exit(No direct script access allowed);
 /**
  * HTML替换处理类，考虑如下几种替换
  * 1. img src : /<img(.+?)src=([\\" ])?(.+?)([ >]+?)/i
  * 2. a href : /<a(.+?)href=([\\" ])?(.+?)([ >]+?)/i
  * 3. ifram.src : /<iframe(.+?)src=([\\" ])?(.+?)([ >]+?)/i
  * 4. frame src : /<frame(.+?)src=([\\" ])?(.+?)([ >]+?)/i
  * 5. js  : /window.open([( ]+?)([\" ]+?)(.+?)([ )+?])/i
  * 6. css  : /background(.+?)url([( ])([\" ]+?)(.+?)([ )+?])/i
  */
 class Myreplace {
  private $moudle_array = array(udata,tdata,tresult,dresult);
  private $content;
  private $relative_dirname;
  private $projectid;
  private $moudle;
  function __construct() {
   $this->CI = &get_instance ();
  }
  /**
   * 替换
   * @param string $content HTML内容
   * @param string $relative 相对路径
   * @param int  $projectid 项目id
   * @moudle string $moudle  模板标识: udata,tdata,tresult,dresult
   */
  public function my_replace($content,$relative,$projectid,$moudle) {
   $this->content = $content;
   $this->relative_dirname = $relative;
   $this->projectid = $projectid;
   if(in_array(strtolower($moudle),$this->moudle_array))
    $this->moudle = $moudle;
   else exit;
   switch($this->moudle) {
    case udata:
     $this->CI->load->model(mupload_data,model);
     break;
    case tdata:
     $this->CI->load->model(taskdata,model);
     break;
    case tresult:
     $this->CI->load->model(taskresult,model);
     break;
    case dresult:
     $this->CI->load->model(dmsresult,model);
     break;
    default:
     break;
   }
   $pattern = /<img(.+?)src=([\\" ])?(.+?)([ >]+?)/i;
   $content = preg_replace_callback( $pattern, array($this, image_replace) , $content );
   $pattern = /<a(.+?)href=([\\" ])?(.+?)([ >]+?)/i;
   $content = preg_replace_callback( $pattern, array($this, html_replace) , $content );
   $pattern = /<iframe(.+?)src=([\\" ])?(.+?)([ >]+?)/i;
   $content = preg_replace_callback( $pattern, array($this, iframe_replace) , $content );
   $pattern = /<frame(.+?)src=([\\" ])?(.+?)([ >]+?)/i; 
   $content = preg_replace_callback( $pattern, array($this, frame_replace), $content );
   $pattern = /window.open([( ]+?)([\" ]+?)(.+?)([ )]+?)/i;
   $content = preg_replace_callback( $pattern, array($this, js_replace), $content );
   $pattern = /background(.+?)url([( ])([\" ]+?)(.+?)([ )+?])/i;
   $content = preg_replace_callback( $pattern, array($this, css_replace), $content);
   return $content;
  }
  private function image_replace($matches) {
   if(count($matches) < 4) return ;
   if( empty($matches[3]) ) return ;
   $matches[3] = rtrim($matches[3],\"/);
   //获取图片的id
   $parent_dir_num = substr_count( $matches[3], ../);
   $relative_dirname = $this->relative_dirname;
   for($i=0; $i<$parent_dir_num; $i++) {
    $relative_dirname = substr( $relative_dirname, 0, strrpos($relative_dirname,"/") );
   }
   $relativepath = rtrim($relative_dirname,/) . /.ltrim($matches[3],./);
   $image_id = $this->CI->model->get_id_by_path_and_project($relativepath,$this->projectid);
   //输出
   if( !empty($image_id) ) {
    if($this->moudle == dresult) {
     return "<img".$matches[1]."src=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/readpic/$image_id?pid=".$this->projectid .$matches[2]. $matches[4];
    } else {
     return "<img".$matches[1]."src=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/picfile/$image_id?pid=".$this->projectid .$matches[2]. $matches[4];
    }
   } else {
    return "<img".$matches[1]."src=".$matches[2].$matches[3].$matches[2].$matches[4];
   }
  }
  private function html_replace( $matches ) {
   if(count($matches) < 4) return ;
   if( empty($matches[3]) ) return ;
   //如果href的链接($matches[3])以http或www或mailto开始，则不进行处理
   //if(preg_match(/^[http|www|mailto](.+?)/i,$matches[3])) 
   // return "<a".$matches[1]."href=".$matches[2].$matches[3].$matches[4];
   $matches[3] = rtrim($matches[3],\"/);
   //处理锚点
   if(substr_count($matches[3],#)>0) 
    $matches[3] = substr($matches[3],0,strrpos($matches[3],#));
   //获取html的id
   $parent_dir_num = substr_count( $matches[3], ../);
   $relative_dirname = $this->relative_dirname;
   for($i=0; $i<$parent_dir_num; $i++) {
    $relative_dirname = substr( $relative_dirname, 0, strrpos($relative_dirname,"/") );
   }
   $relativepath = rtrim($relative_dirname,/) . /.ltrim($matches[3],./);
   $txtfile_id = $this->CI->model->get_id_by_path_and_project($relativepath,$this->projectid);
   //输出
   if( !empty($txtfile_id ) ) {
    if($this->moudle == dresult) {
     return "<a".$matches[1]."href=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/readfile/$txtfile_id?pid=".$this->projectid .$matches[2].$matches[4];
    } else {
     return "<a".$matches[1]."href=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/txtfile/$txtfile_id?pid=".$this->projectid .$matches[2].$matches[4];
    }
   } else {
    return "<a".$matches[1]."href=".$matches[2].$matches[3].$matches[2].$matches[4];
   }
  }
  private function iframe_replace( $matches ) {
   if(count($matches) < 4) return ;
   if( empty($matches[3]) ) return ;
   $matches[3] = rtrim($matches[3],\"/);
   //处理锚点
   if(substr_count($matches[3],#)>0) 
    $matches[3] = substr($matches[3],0,strrpos($matches[3],#));
   //获取html的id
   $parent_dir_num = substr_count( $matches[3], ../);
   $relative_dirname = $this->relative_dirname;
   for($i=0; $i<$parent_dir_num; $i++) {
    $relative_dirname = substr( $relative_dirname, 0, strrpos($relative_dirname,"/") );
   }
   $relativepath = rtrim($relative_dirname,/) . /.ltrim($matches[3],./);
   $txtfile_id = $this->CI->model->get_id_by_path_and_project($relativepath,$this->projectid);
   //输出
   if( !empty($txtfile_id ) ) {
    if($this->moudle == dresult) {  
     return "<iframe".$matches[1]."src=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/readfile/$txtfile_id?pid=".$this->projectid .$matches[2].$matches[4];
    } else {
     return "<iframe".$matches[1]."src=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/txtfile/$txtfile_id?pid=".$this->projectid .$matches[2].$matches[4];
    }
   } else {
    return "<iframe".$matches[1]."src=".$matches[2].$matches[3].$matches[2].$matches[4];
   }
  }
  private function frame_replace( $matches ) {   
   if(count($matches) < 4) return ;
   if( empty($matches[3]) ) return ;
   $matches[3] = rtrim($matches[3],\"/);
   //处理锚点
   if(substr_count($matches[3],#)>0) 
    $matches[3] = substr($matches[3],0,strrpos($matches[3],#));
   //获取html的id
   $parent_dir_num = substr_count( $matches[3], ../);
   $relative_dirname = $this->relative_dirname;
   for($i=0; $i<$parent_dir_num; $i++) {
    $relative_dirname = substr( $relative_dirname, 0, strrpos($relative_dirname,"/") );
   }
   $relativepath = rtrim($relative_dirname,/) . /.ltrim($matches[3],./);
   $txtfile_id = $this->CI->model->get_id_by_path_and_project($relativepath,$this->projectid);
   //输出
   if( !empty($txtfile_id ) ) {
    if($this->moudle == dresult) { 
     return "<frame".$matches[1]."src=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/readfile/$txtfile_id?pid=".$this->projectid.$matches[2].$matches[4];
    } else {
     return "<frame".$matches[1]."src=".$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/txtfile/$txtfile_id?pid=".$this->projectid.$matches[2].$matches[4];
    }
   } else {
    return "<frame".$matches[1]."src=".$matches[2].$matches[3].$matches[2].$matches[4];
   }
  }
  private function js_replace( $matches ){
   if(count($matches) < 4) return ;
   if( empty($matches[3]) ) return ;
   //处理链接
   $arr_html = split(,,$matches[3]);
   $href = $arr_html[0];
   $other = ;
   for($i=0; $i<count($arr_html); $i++)
    $other = $arr_html[$i].", ";
   $other = rtrim($other,"\, ");
   $href =rtrim($href,\\");
   //处理锚点
   if(substr_count($href,#)>0) 
    return "window.open".$matches[1].$matches[2].$matches[3].$matches[4];;
   //获取html的id
   $parent_dir_num = substr_count( $href, ../);
   $relative_dirname = $this->relative_dirname;
   for($i=0; $i<$parent_dir_num; $i++) {
    $relative_dirname = substr( $relative_dirname, 0, strrpos($relative_dirname,"/") );
   }
   $relativepath = rtrim($relative_dirname,/) . /.ltrim($href,./);
   $txtfile_id = $this->CI->model->get_id_by_path_and_project($relativepath,$this->projectid);
   //输出
   if( !empty($txtfile_id ) ) {
    if($this->moudle == dresult) { 
     return "window.open".$matches[1].$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/readfile/$txtfile_id?pid=".$this->projectid.$matches[2].,.$other.$matches[4];
    } else {
     return "window.open".$matches[1].$matches[2].$this->CI->config->item("base_url")."cdms/".$this->moudle."/txtfile/$txtfile_id?pid=".$this->projectid.$matches[2].,.$other.$matches[4];
    }
   } else {
    return "window.open".$matches[1].$matches[2].$matches[3].$matches[4];
   }
  }
  private function css_replace( $matches ) {
   if(count($matches) < 5) return ;
   if( empty($matches[4]) ) return ;
    
   $matches[4] = rtrim($matches[4],\"/);
   //获取图片的id
   $parent_dir_num = substr_count( $matches[4], ../);
   $relative_dirname = $this->relative_dirname;
   for($i=0; $i<$parent_dir_num; $i++) {
    $relative_dirname = substr( $relative_dirname, 0, strrpos($relative_dirname,"/") );
   }
   $relativepath = rtrim($relative_dirname,/) . /.ltrim($matches[4],./);
   $image_id = $this->CI->model->get_id_by_path_and_project($relativepath,$this->projectid);
   //输出
   if( !empty($image_id) ) {
    if($this->moudle == dresult) {
     return "background".$matches[1]."url".$matches[2].$matches[3].$this->CI->config->item("base_url")."cdms/".$this->moudle."/readpic/$image_id?pid=".$this->projectid .$matches[3]. $matches[5];
    } else {
     return "background".$matches[1]."url".$matches[2].$matches[3].$this->CI->config->item("base_url")."cdms/".$this->moudle."/picfile/$image_id?pid=".$this->projectid .$matches[3]. $matches[5];
    }
   } else {
    return "background".$matches[1]."url".$matches[2].$matches[3].$matches[4].$matches[3].$matches[5];
   }
  }
 }
/* End of Myreplace.php */
/* Location: /application/libraries/Myreplace.php */