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HTML预览 正则替换

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HTML预览 正则替换

[PHP]代码

<?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 */

标签:CodeIgniter,正则表达式

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