php正则替换处理HTML页面的方法_php技巧

本文实例讲述了php正则替换处理HTML页面的方法。分享给大家供大家参考。具体如下：

<&#63;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 (.+&#63;)src=([\'\" ])&#63;(.+&#63;)([  alt="php正则替换处理HTML页面的方法_php技巧" >]+&#63;)/i'
  * 2. a href : '/<a(.+&#63;)href=([\'\" ])&#63;(.+&#63;)([ >]+&#63;)/i'
  * 3. ifram.src : '/<iframe(.+&#63;)src=([\'\" ])&#63;(.+&#63;)([ >]+&#63;)/i'
  * 4. frame src : '/<frame(.+&#63;)src=([\'\" ])&#63;(.+&#63;)([ >]+&#63;)/i'
  * 5. js  : '/window.open([( ]+&#63;)([\'" ]+&#63;)(.+&#63;)([ )+&#63;])/i'
  * 6. css  : '/background(.+&#63;)url([( ])([\'" ]+&#63;)(.+&#63;)([ )+&#63;])/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 (.+&#63;)src=([\'\" ])&#63;(.+&#63;)([  alt="php正则替换处理HTML页面的方法_php技巧" >]+&#63;)/i';
   $content = preg_replace_callback( $pattern, array($this, 'image_replace') , $content );
   $pattern = '/<a(.+&#63;)href=([\'\" ])&#63;(.+&#63;)([ >]+&#63;)/i';
   $content = preg_replace_callback( $pattern, array($this, 'html_replace') , $content );
   $pattern = '/<iframe(.+&#63;)src=([\'\" ])&#63;(.+&#63;)([ >]+&#63;)/i';
   $content = preg_replace_callback( $pattern, array($this, 'iframe_replace') , $content );
   $pattern = '/<frame(.+&#63;)src=([\'\" ])&#63;(.+&#63;)([ >]+&#63;)/i'; 
   $content = preg_replace_callback( $pattern, array($this, 'frame_replace'), $content );
   $pattern = '/window.open([( ]+&#63;)([\'" ]+&#63;)(.+&#63;)([ )]+&#63;)/i';
   $content = preg_replace_callback( $pattern, array($this, 'js_replace'), $content );
   $pattern = '/background(.+&#63;)url([( ])([\'" ]+&#63;)(.+&#63;)([ )+&#63;])/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- alt="php正则替换处理HTML页面的方法_php技巧" >CI->config->item("base_url")."cdms/".$this->moudle."/readpic/$image_id&#63;pid=".$this->projectid .$matches[2]. $matches[4];
    } else {
     return "<img ".$matches[1]."src=".$matches[2].$this- alt="php正则替换处理HTML页面的方法_php技巧" >CI->config->item("base_url")."cdms/".$this->moudle."/picfile/$image_id&#63;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](.+&#63;)/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&#63;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&#63;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&#63;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&#63;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&#63;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&#63;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&#63;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/$txtfile_id&#63;pid=".$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/$image_id&#63;pid=".$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/$image_id&#63;pid=".$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 */

希望本文所述对大家的php程序设计有所帮助。