<?php
/*
+--------------------------------------------------+
| Author: Allan Irvine  

<ai@ayrsoft.com>           |
+--------------------------------------------------+
| Date: WED

03 MARCH 2004                          |
+--------------------------------------------------+


| Origin: Scotland, United kingdom                 |


+--------------------------------------------------+
| Script: newsReader.php                  

        |
+--------------------------------------------------+
| No License                    

                   |
| free to use for personal and commercial purposes |


+--------------------------------------------------+
*/

//+++++++++++++++++++++++++++++++++++++++++++++++++++
// CHANGES
//---------------------------------------------------
// Added a property $ampReplace, this is a

quick fix
// it is used to replace ampersands bfore php get a hold of
// the rss file, and

replace it once php has dealt with it
// I was getting lines split by an ampersand, pointed out

by
// Mathew Clark of Divergent Systems, cheers.
// I will need to address this later on as I

deem this fix
// as a bit of a kludge, not nice.
// Allan Irvine <airvine@ayrsoft.com>
// 29th

April 2004
//----------------------------------------------------
//
//++++++++++++++++++++++++++++++++++++++++++++++++++++



class newsReader{

    var $content  =  

array();
    var $openTag  =   array();
    var $closeTag =   array();
    var

$currentTag;
    var $rss;
    var $level;
    var $startCollecting;
    var $wantedElements;
    

var $cacheData;
    var $ampReplace;

    function newsReader(){
  $this->rss =

xml_parser_create();
  xml_set_object($this->rss, $this);
  

xml_parser_set_option($this->rss,XML_OPTION_CASE_FOLDING,1);
  

xml_set_element_handler($this->rss,_startElement,_endElement);
  

xml_set_character_data_handler($this->rss,_parseData);
  $this->wantedElements['CHANNEL']

  =    array("TITLE","DESCRIPTION","LINK","IMAGES");
  $this->wantedElements['IMAGE']  

  =    array("URL");
  $this->wantedElements['ITEM']      =    

array("TITLE","DESCRIPTION","LINK");
    }

    function _findLevel($n){
  

if(eregi("(CHANNEL)|(IMAGE)|(ITEM)",$n,$regs)){
     $this->level =

$regs[0];
  }
    }

    function _startToCollect($n){
  

$this->startCollecting = (in_array($n,$this->wantedElements[$this->level]))?1:0;
    }

    

function _startElement($t,$name,$attribs){
  $this->currentTag = $name;
  

$this->_findLevel($name);
  $this->_startToCollect($name);
  

if($this->startCollecting){
     $this->openTag[]="<tr><td>\n";
  }
    

}

    function _endElement($t,$name){
  if($this->startCollecting)
    

$this->closeTag[]="</td></tr>\n";
    }

    function _parseData($t,$cData){
  

$cData = str_replace($this->ampReplace,"&",$cData);// quick fix, will need to address later on
  

if(strlen(trim($cData))&&($this->startCollecting)){
    

if(eregi("link",$this->currentTag)){
    $this->content[]="<A

HREF=\"".$cData."\" TARGET=\"_BLANK\">".$cData."</A>\n";
    

}elseif(eregi("url",$this->currentTag)){
    $this->content[]="<IMG

SRC=\"".$cData."\">\n";
     }else{
    

$this->content[]=$cData;
     }
  }
    }

    function

readNewsFeed($source){

  $this->_readCacheData();
  

if($this->_useCache($source)){
     $this->_writeCacheEntry($source);
    

$file = file("newsCache/".md5($source));
  }else{
     $file =

file($source);
  }
     $file = implode("\n",$file);
    

$this->ampReplace = md5(time());// quick fix, will need to address later on
    

$file = str_replace("&",$this->ampReplace,$file);// quick fix, will need to address later on

  

    if(!xml_parse($this->rss,$file,1)){
    $ln =  

xml_get_current_line_number($this->rss);
            $msg =  

xml_error_string(xml_get_error_code($this->rss));
            return  ("An XML

error occurred on line $ln: $msg");
     }else{
    $rtn =

"<TABLE border=0>\n";
    for($i=0;$i<count($this->openTag);$i++){
  

     $rtn.= $this->openTag[$i].$this->content[$i].$this->closeTag[$i];
  

  }
    $rtn.="</TABLE>\n";

    

if(!$this->_useCache($source)){
       

$this->_writeCacheEntry($source);
    }

    

return $rtn;

     }
    }


    function _checkCacheDir(){
  

if(!is_dir("newsCache")){
     mkdir("newsCache");
  }
    }

    

function _readCacheData(){
  $file = file("newsCache/newsReaderCache.php");
  

if(strlen(trim($file[0]))){
     $this->cacheData = unserialize($file[0]);
  

}
    }

    function _useCache($source){
  if($key =

array_search($source,$this->cacheData)){
     $sec = explode(" ",$key);
  

    if((time() - $sec[1])>(3600)){
    return 0;
    

}else{
    return 1;
     }
  }else{
    

return 0;
  }
    }

    function _writeCacheEntry($source){
  

$this->_checkCacheDir();
  $this->_updateCacheArray($source);
  $fp =

fopen("newsCache/newsReaderCache.php","w");
  

fwrite($fp,serialize($this->cacheData));
  fclose($fp);

  $data =

file($source);
  $data = implode("\n",$data);
  $fp =

fopen("newsCache/".md5($source),"w");
  fwrite($fp,$data);
  fclose($fp);

    

}

    function _updateCacheArray($source){

  if(is_array($this->cacheData) &&

in_array($source,$this->cacheData)){
     foreach($this->cacheData as

$key=>$val){
    if(trim($val) == trim($source)){
    

    $key =microtime();
    }
    

$new[$key]= $val;
     }
     $this->cacheData = $new;
  

}else{
     $this->cacheData[microtime()] = $source;
  }
    }

}

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
//\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// test data below

once you are happy how it works just remove this stuff
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

//bbc news

stories

$newsSources['AA'] ['<input type=text name=imie>']="$imie";



?>
<style

type=text/css><!--
td {
    font-family:arial,verdana,tahoma;
    font-size:12px;
    

background-color:#f0f0f0;
    color:#000000;
}
--></style>
<?php


foreach($newsSources as

$name=>$array){

    echo $name;
    echo "<form method=post

action=".$_SERVER['PHP_SELF'].">\n";
    echo "<select name=source>\n";
    foreach($array as

$key=>$val){
  $sel = ($val == $source)? " SELECTED " : "";
  echo "<option

$sel value=$val>$key\n";
    }
    echo "</select>\n";
    echo "<input type=submit name=go

value=Go>\n";
    echo "</form>\n";
}

//++++++++++++++++
// script usage  |
//++++++++++++++++
#$source = "http://www.newscientist.com/syndication/news.rdf";
#$go = 1;
if($go){
    $feed =

new newsReader;
    echo $feed->readNewsFeed($source);
}





?>