php正则替换处理HTML页面的方法

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：

<?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 */

PS：这里再为大家提供2款非常方便的正则表达式工具供大家参考使用：

JavaScript正则表达式在线测试工具：
http://tools.jb51.net/regex/javascript

正则表达式在线生成工具：
http://tools.jb51.net/regex/create_reg

希望本文所述对大家的php程序设计有所帮助。