rdf.class.php

基于Fase 4 RDF/RSS语法分析器

    * @access    private
	* @author    Stefan Saasen <[e-mail]>
    * @param     string $data    RDF File XML Data
	* @see		 _clear_Items()
    */    
    function _parse_xRDF( $data )
    {
        $this->_clear_Items(); 
        $xml_parser = xml_parser_create(); 
        xml_set_object($xml_parser,$this);
   		xml_parser_set_option($xml_parser,XML_OPTION_CASE_FOLDING,0);
        xml_set_element_handler($xml_parser, "_startElement", "_endElement"); 
        xml_set_character_data_handler($xml_parser, "_parseData");     
        if (!xml_parse($xml_parser, trim($data))) {
                $this->_throw_exception(sprintf("XML error: %s at line %d", 
                xml_error_string(xml_get_error_code($xml_parser)), 
                xml_get_current_line_number($xml_parser))."<br /><br />Exception in function parse_RDF()."); 
            } 
        xml_parser_free($xml_parser); 
    }     

    /**
    * This Methods allows you to set the Refresh Time
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @param     int $seconds time files will be cached (in seconds). 
	* @return 	 boolean
	* @see		 _refresh
    */    
    function set_refresh( $seconds )
    {
        $this->_refresh = (time() - $seconds);
        return true;
    }
    
    /**
    * This Methods allows you to set the No. of <item>s to display
    *
    * @access    public
    * @param     int $int No of max <item>s
	* @author    Stefan Saasen <[e-mail]>
	* @return 	 boolean
	* @see		 _max_count, _endElement()
    */    
    function set_max_item( $int )
    {
        $this->_max_count = $int;
        return true;
    }
    
    /**
    * This Methods allows you to set the Cache Directory
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @param     string $dir Path to Directory.
	* @return 	 boolean
	* @see		 _cache_dir
    */    
    function set_CacheDir( $dir ) 
    {
        if(substr($dir, -1) != "/") {
            $dir = $dir."/";
        }
        $this->_cache_dir = $dir;
    }
    
    /**
    * This Method displays Error Messages and terminates the Execution of the Script
    *
    * @access    private
    * @param     string $msg Message to display on failure
	* @author    Stefan Saasen <[e-mail]>
    */    
    function _throw_exception( $msg )
    {
        echo "<div style=\"font-family: verdana, helvetica, arial, sans-serif;font-size:11px; color: #6699cc;margin-top:10px;margin-bottom:10px;\" align=\"center\">fase4 RDF Error: ".$msg."</div>";
        return true;
    }
    
    /**
    * This Method clears the Array containig the Items.
    *
    * @access    private
    * @param     array $array Itemarray
	* @author    Stefan Saasen <[e-mail]>
    * @see       _item
    */    
    function _clear_Items( $array = "") { 
            $this->_item = array ("title"=>"", "link"=>"", "description"=>"", "url"=>"" ); 
    }
    /**
    * This Method clears the Array containig the Channel Items.
    *
    * @access    private
    * @param     array $array Array containing the Channel Items
	* @author    Stefan Saasen <[e-mail]>
    * @see       _item
    */    
    function _clear_cItems( $array = "") { 
            $this->_citem = array ("title"=>"", "link"=>"", "description"=>"", "url"=>"" ); 
    }     

    /**
    * XML Parser Start Element Handler
    *
    * @access    private
	* @author    Stefan Saasen <[e-mail]>
    * @param     mixed  $parser a reference to the XML parser calling the handler. 
    * @param     string $name contains the name of the element for which this handler is called.
    * @param     string $attrs contains an associative array with the element's attributes (if any). 
	* @see		 _get_ChannelData(), _clear_Items(), _type, _parse_mode, _depth, _tags, _cdepth, _ctags
    */    
    function _startElement($parser, $name, $attrs) {
        // We have to determine, which type of xml data we have to parse
        if($name == "rss") {
            $this->_type = "rss";
        } elseif($name == "rdf:RDF" OR $name == "rdf") {
            $this->_type = "rdf";
        }
        
        if ( $name == "channel" AND $this->_type != "rdf" ) {
            $this->_parse_mode = "channel";
        } elseif ( ($name=="item")
                    ||($name=="image")
                    ||($name=="textinput")
                    ||(($name=="channel") && ($this->_type != "rss")) ) {
            if($this->_parse_mode=="channel") {
                $this->_get_ChannelData( $parser );
            }
            $this->_parse_mode = "all";
        }
        
        $this->_depth[$parser]++; 
        array_push($this->_tags, $name); 
        $this->_cdepth[$parser]++; 
        array_push($this->_ctags, $name);
    }   // END _startElement()

    /**
    * Retrives the Channel Data in <rss> File
    *
    * @access    private
	* @author    Stefan Saasen <[e-mail]>
    * @param     mixed  $parser a reference to the XML parser calling the handler. 
	* @see		 _output, _display_opt, _citem
    */        
    function _get_ChannelData( $parser )
    {
                if( empty($this->_display_opt["channel"]) OR
                    $this->_display_opt["channel"] != "hidden") {   
                $this->_output .= "<tr><td>\n";
                $this->_output .= '<table border="0" width="100%" class="fase4_rdf_meta" cellspacing="5" cellpadding="2">'."\n";
                $this->_output .= "<tr><td class=\"fase4_rdf\"><div class=\"fase4_rdf_title\">".htmlspecialchars($this->_citem["title"])."</div></td></tr>\n"; 
                $this->_output .= "<tr><td class=\"fase4_rdf\">".strip_tags($this->_citem["description"], "<a>, <img>")."</td></tr>\n";
                $this->_output .= "<tr><td>&nbsp;</td></tr>\n";
                $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
                if($this->_display_opt["build"] != "hidden") {
                    if($this->_citem["lastBuildDate"]){$this->_output .= "build: ". $this->_citem["lastBuildDate"]."<br />";}
                } 
                if($this->_display_opt["cache_update"] != "hidden" && ( $_update = $this->get_cache_update_time()) ) {
                $this->_output .= "cache update: ".$_update."<br />\n";
                }
                $this->_output .= "<a href=\"".$this->_citem["link"]."\" ";
                if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
                $this->_output .= ">".$this->_cut_string($this->_citem["link"])."</a>";
                $this->_output .= "</td></tr>\n";
                $this->_output .= "</table></td></tr>";
                }
                    $this->_array_channel = array(  "title"=>$this->_citem["title"], 
                                                    "link"=>$this->_citem["link"],
                                                    "description"=>$this->_citem["description"],
                                                    "lastBuildDate"=>$this->_citem["lastBuildDate"]);                
    }
    
    /**
    * XML Parser End Element Handler
    *
    * @access    private
	* @author    Stefan Saasen <[e-mail]>
    * @param     mixed  $parser a reference to the XML parser calling the handler. 
    * @param     string $name contains the name of the element for which this handler is called.
	* @see		 _clear_Items(), _type, _parse_mode, _depth, _tags, _cdepth, _ctags, _item, _output, _display_opt
    */        
    function _endElement($parser, $name) { 
        array_pop($this->_tags); 
        $this->_depth[$parser]--;
        array_pop($this->_ctags); 
        $this->_cdepth[$parser]--;
        switch ($name) { 
            case "item":
                if(empty($this->_max_count) OR $this->_item_count < $this->_max_count) {
                    if($this->_item["title"] != $this->_item["description"] 
                                            AND $this->_item["description"]) {
						// the title link
                        $this->_output .= "<tr><td class=\"fase4_rdf\"><a class=\"url\" href=\"".$this->_item["link"]."\" ";
                        if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
                        $this->_output .= ">".strip_tags($this->_item["title"], "<a>, <img>")."</a></td></tr>\n";
						
						// the text body
        				$this->_output .= "<tr><td class=\"fase4_rdf\">".strip_tags($this->_item["description"], "<a>, <img>")."</td></tr>\n";
						
                        // we just display the <hr> if there is a description
						// <hr style=\"border-style: dotted\" noshade=\"noshade\" size=\"1\" />
						$this->_output .= "<tr><td style=\"border-top: 1px dotted #999;\">&nbsp;</td></tr>\n";

					} else {
                        $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
                        $this->_output .= "<a class=\"url\" href=\"".$this->_item["link"]."\" ";
                        if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
                        $this->_output .= ">".$this->_item["title"]."</a></td></tr>\n";
                    }
                        $this->_array_item[] = array(   "title"=>$this->_item["title"], 
                                                        "link"=>$this->_item["link"],
                                                        "description"=>$this->_item["description"]);
                        ++$this->_item_count;
                }
                    $this->_clear_Items(); 
            break; 
            case "image": 
                if($this->_display_opt["image"] != "hidden" && $this->_item["url"]) {            
                    $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
                    $this->_output .= "<a href=\"".$this->_item["link"]."\" ";
                    if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
                    $this->_output .= "><img src=\"".$this->_item["url"]."\"";
                if($this->_item["width"] && $this->_item["height"]) {
                    $this->_output .= " width=\"".$this->_item["width"]."\" height=\"".$this->_item["height"]."\"";
                }
                $this->_output .= " alt=\"".$this->_item["title"]."\" border=\"0\" /></a></td></tr>\n"; 
                
                    $this->_array_image[] = array(  "url"=>$this->_item["url"], 
                                                    "link"=>$this->_item["link"],
                                                    "width"=>$this->_item["width"],
                                                    "height"=>$this->_item["height"]);
                    $this->_clear_Items(); 
                } elseif( $this->_display_opt["image"] == "hidden" ) {
                    $this->_clear_Items();
                }
                                
            break; 
            case "channel": 
                if($this->_display_opt["channel"] != "hidden" AND $this->_item["title"] != "") {   
                    $this->_output .= "<tr><td>\n";
                    $this->_output .= '<table border="0" width="100%" class="fase4_rdf_meta" cellspacing="5" cellpadding="2">'."\n";
                    $this->_output .= "<tr><td class=\"fase4_rdf\"><div class=\"fase4_rdf_title\">".htmlspecialchars($this->_item["title"])."</div></td></tr>\n"; 
                    $this->_output .= "<tr><td class=\"fase4_rdf\">".strip_tags($this->_item["description"], "<a>, <img>")."</td></tr>\n";
                    $this->_output .= "<tr><td>&nbsp;</td></tr>\n";
                    $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
                if($this->_display_opt["build"] != "hidden") {
                    if($this->_item["lastBuildDate"]){$this->_output .= "build: ". $this->_item["lastBuildDate"]."<br />";}
                }
                if($this->_display_opt["cache_update"] != "hidden" && ( $_update = $this->get_cache_update_time()) ) {
                    $this->_output .= "cache update: ".$_update."<br />\n";
                }
                $this->_output .= "<a href=\"".$this->_item["link"]."\" ";
                if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
                $this->_output .= ">".$this->_cut_string($this->_item["link"])."</a>\n";
                $this->_output .= "</td></tr>\n";
                $this->_output .= "</table></td></tr>\n";
                }
                    $this->_array_channel = array(  "title"=>$this->_item["title"], 
                                                    "link"=>$this->_item["link"],
                                                    "description"=>$this->_item["description"],
                                                    "lastBuildDate"=>$this->_item["lastBuildDate"]);
                    $this->_clear_Items();
                    $this->_clear_cItems();
            break; 
			case "textinput":
                if($this->_display_opt["textinput"] != "hidden" && $this->_item["name"] && $this->_item["link"]) {
                    $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
    				$this->_output .= "<form action=\"".$this->_item["link"]."\" ";
                    if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
                    $this->_output .= "method=\"get\">\n";
                    $this->_output .= "<div class=\"fase4_rdf_title\">".$this->_item["title"]."</div>";
                    $this->_output .= strip_tags($this->_item["description"], "<a>, <img>")."<br><br>\n";
                    $this->_output .= "<input class=\"fase4_rdf_input\" type=\"text\" name=\"".$this->_item["name"]."\">&nbsp;\n";
                    $this->_output .= "<input class=\"fase4_rdf_input\" type=\"submit\" value=\"go\">";
                    $this->_output .= "</form>\n";
                    $this->_output .= "</td></tr>\n";
                    $this->_array_textinput = array(    "title"=>$this->_item["title"],
                                                        "name"=>$this->_item["name"],
                                                        "link"=>$this->_item["link"],
                                                        "description"=>$this->_item["description"]);
                    $this->_clear_Items();
                } elseif( $this->_display_opt["textinput"] == "hidden" ) {
                    $this->_clear_Items();
                }
                
			break;            
        } 
    } 
    
    /**
    * This Method returns the data from the <channel /> paragraph.
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @return    array
	* @see		 _array_channel
    */        
    function get_array_channel( )
    {
        return $this->_array_channel;
    }
    
    /**
    * This Method returns the data from each <item /> paragraph.
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @return    array
	* @see		 _array_item
    */        
    function get_array_item( )
    {
        return $this->_array_item;
    }
    
    /**
    * This Method returns the data from <textinput />.
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @return    array
	* @see		 _array_textinput
    */        
    function get_array_textinput( )
    {
        return $this->_array_textinput;
    }

    /**
    * This Method returns the data from <image />.
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @return    array
	* @see		 _array_image
    */        
    function get_array_image( )
    {
        return $this->_array_image;
    }    
    
    /**
    * XML Parser Data Handler
    *
    * @access    private
	* @author    Stefan Saasen <[e-mail]>
    * @param     mixed  $parser a reference to the XML parser calling the handler. 
    * @param     string $text contains the character data as a string. 
	* @see		 _parse_mode, _item, _tags, _depth, _citem, _ctags, _cdepth
    */        
    function _parseData($parser, $text) 
    { 
        $clean = preg_replace("/\s/", "", $text); 
        if ($clean) { 
            $text = preg_replace("/^\s+/", "", $text); 
                if($this->_parse_mode == "all") {
                        if ( $this->_item[$this->_tags[$this->_depth[$parser]]] ) { 
                           $this->_item[$this->_tags[$this->_depth[$parser]]] .= $text; 
                        } else { 
                           $this->_item[$this->_tags[$this->_depth[$parser]]] = $text;  
                        }
                } elseif ($this->_parse_mode == "channel") {
                        if ( $this->_citem[$this->_ctags[$this->_cdepth[$parser]]] ) { 
                           $this->_citem[$this->_ctags[$this->_cdepth[$parser]]] .= $text; 
                        } else { 
                           $this->_citem[$this->_ctags[$this->_cdepth[$parser]]] = $text;  
                        }                        
                }
        } 
    } 
    
    /**
    * This Method allows you to choose if specific Parameters are displayed or not. These are: 
    * image, channel, textinput, build and cache_update. If set to "hidden" those elements won't be displayed.
    *
    * @access    public
	* @author    Stefan Saasen <[e-mail]>
    * @param     array  $options
	* @see		 _display_opt
    */        
    function set_Options( $options = "" )
    {
        if(is_array( $options )) {
            $this->_display_opt = $options;
            return true;