Parsing RSS feed into PHP

Hi everyone,

I'm redesigning a website and want to use an existing RSS parser that is used on the website, but I need to be able to limit the amount of feeds that it displays. Here is the code I use to call the parser:

<?
include_once("XmlNewParser.class.php");
$rss_url = 'http://www.example.com/rss_fixer_new.php';
$XMLpar = new SimpleXmlParser($rss_url);

Heres the rss_fixer_new code:

<?php

$rss_url = 'http://www.example.com/blog/?feed=rss2';

header("Content-Type: text/xml");
echo shell_exec('wget -q -O - '.$rss_url);
?>

And here is the XMLNewParser.class.php code

<?php
/************************************************** **********************/
/* XmlParser.class.php */
/* ================================================== ===================*/
/* Copyright (c) 2005 by Gobinath */
/* */
/* Author(s): Gobinath */
/* ================================================== ===================*/
/* Title: A Simple XML parser Class */
/* Date: April 27th, 2005 */
/* ================================================== ===================*/
/* Credits:
I have completed this class based on the articles from php.net */
/* ================================================== ===================*/
/* Information: The Class does not Check the error nor validate the XML */
/* its works fine with a Well formed XML */
/* ================================================== ===================*/

class SimpleXmlParser {
public
# Variable Holding Parser
$SimpleParser = null,
$feedUrl = null,
# Variables to Hold the Data
$title = '',
$description = '',
$link = '',
$author = '',
$pubDate = '',
$insideitem = false,
$tag = '';

public function __construct($MyFeed) {
# To begin, I create an instance of the XML parser
# creates a new XML parser and returns a reousurce handle referencing
$this->SimpleParser = xml_parser_create();
# Assigns the Feed Source to the Member Variable
$this->feedUrl = $MyFeed;
# allows to use parser inside object
xml_set_object($this->SimpleParser, $this);
# Sets the element handler functions for the XML parser parser
xml_set_element_handler($this->SimpleParser, 'XmlParserFirstElement', 'XmlParserendElement');
# Sets the character data handler function for the XML parser parser
xml_set_character_data_handler($this->SimpleParser, 'characterData');
# Call to Parser Function
$this->ParseFeed();
}

public function SimpleXmlParser($MyFeed) {
# Purpose : Constructor, Which will initialize the XML Parser
$this->__construct($MyFeed);
}

public function XmlParserFirstElement($parser, $tagName, $attrs) {
# The Function Will be called, when ever the XML_PARSER Encounters a start Tag, in the XML File
if ($this->insideitem) {
$this->tag = $tagName;
} elseif (strtoupper($tagName)=='ITEM') {
$this->insideitem = true;
}
}

public function XmlParserendElement($parser, $tagName) {
# The Function Will be called, when ever the XML_PARSER Encounters a end Tag, in the XML File
if (strtoupper($tagName)=='ITEM') {
# pubDate element is made to display in HTML
printf("<div style='padding:5px;'><div class='news_date'>%s</div>", date("m.d.Y",strtotime($this->pubdate)));

# Description element is made to display in HTML
printf("<div ><a class='news_text' href='%s' target='new'>%s</a><br /></div><div style='clear:both'></div></div>", trim($this->link), htmlspecialchars(trim($this->title)));
# Deallocation of all Global Variables
$this->title = '';
$this->description = '';
$this->link = '';
$this->pubdate = '';
$this->insideitem = false;
}
}

# Function will be called by the Parser when the end tage of the element is processed. Requires Two Permeters
public function characterData($parser, $data) {
# Permeters: the parser instance and the string containing the data.
if ($this->insideitem) {
switch (strtoupper($this->tag)) {
case 'TITLE':
$this->title .= $data;
break;
case 'DESCRIPTION':
$this->description .= $data;
break;
case 'LINK':
$this->link .= $data;
break;
case 'PUBDATE':
$this->pubdate .= $data;
break;
}
}
}

public function ParseFeed(){
# This is the Place we need to Do error Handling for the XML file, which is not done in this class
# Open the XML file for reading.
# This part will be executed when we compiler is Unable to Open the XML Feed
$fp = fopen($this->feedUrl, 'r') or die('Oops! Unexpected Error While Reading the Feed');
# Starts reading the contents of the file, 4K at a time, and put it in the variable “$data”
while ($data = fread($fp, 4096)) {
xml_parse($this->SimpleParser, $data, feof($fp));
}
# Perform Some Clean Up Work Before Closing the File.
# Closing the XML File
fclose($fp);
# Release the XML Parser
xml_parser_free($this->SimpleParser);
}
}
?>

I would like to limit the parser to 5 feeds. How do I do this?

Thanks

[edited by: eelixduppy at 11:55 pm (utc) on May 25, 2007]
[edit reason] removed specifics [/edit]

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