rss2array
rss2array downloads a remote RSS 0.91 feed and puts most of the useful info into a PHP array. Other feed formats may work too.
Instructions
- Copy the code below into a file called "inc.rss2array.php", and place it in the same directory as your script.
- Copy the code under "example usage" at the top of this script into your script to see it in action - this should print out the array in a human-readable format. See print_r in the PHP manual for more info.
- If you use the script, a link back to this page would be appreciated (but not required!)
- Any problems or questions contact dan@freelancers.net.
<?
#
# rss2array
#
# example usage:
#
# require("inc.rss2array.php");
# $rss_array = rss2array("http://news.bbc.co.uk/rss/newsonline_world_edition/front_page/rss.xml");
# print "<pre>";
# print_r($rss_array);
# print "</pre>";
#
# author: dan@freelancers.net
#
#
# global vars
#
global $rss2array_globals;
#
# fetch_feed
#
function rss2array($url){
global $rss2array_globals;
#
# empty our global array
#
$rss2array_globals = array();
#
# if the URL looks ok
#
if(preg_match("/^http:\/\/([^\/]+)(.*)$/", $url, $matches)){
$host = $matches[1];
$uri = $matches[2];
$request = "GET $uri HTTP/1.0\r\n";
$request .= "Host: $host\r\n";
$request .= "User-Agent: RSSMix/0.1 http://www.rssmix.com\r\n";
$request .= "Connection: close\r\n\r\n";
#
# open the connection
#
if($http = fsockopen($host, 80, $errno, $errstr, 5)){
#
# make the request
#
fwrite($http, $request);
#
# read in for max 5 seconds
#
$timeout = time() + 5;
while(time() < $timeout && !feof($http)) {
$response .= fgets($http, 4096);
}
#
# split on two newlines
#
list($header, $xml) = preg_split("/\r?\n\r?\n/", $response, 2);
#
# get the status
#
if(preg_match("/^HTTP\/[0-9\.]+\s+(\d+)\s+/", $header, $matches)){
$status = $matches[1];
#
# if 200 OK
#
if($status == 200){
#
# create the parser
#
$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
#
# parse!
#
xml_parse($xml_parser, trim($xml), true) or $rss2array_globals['errors'][] = xml_error_string(xml_get_error_code($xml_parser)) . " at line " . xml_get_current_line_number($xml_parser);
#
# free parser
#
xml_parser_free($xml_parser);
}
else {
$rss2array_globals['errors'][] = "Can't get feed: HTTP status code $status";
}
}
#
# Can't get status from header
#
else {
$rss2array_globals['errors'][] = "Can't get status from header";
}
}
#
# Can't connect to host
#
else {
$rss2array_globals['errors'][] = "Can't connect to $host: $errstr";
}
}
#
# Feed url looks wrong
#
else {
$rss2array_globals['errors'][] = "Invalid url: $url";
}
#
# unset all the working vars
#
unset($rss2array_globals['channel_title']);
unset($rss2array_globals['inside_rdf']);
unset($rss2array_globals['inside_rss']);
unset($rss2array_globals['inside_channel']);
unset($rss2array_globals['inside_item']);
unset($rss2array_globals['current_tag']);
unset($rss2array_globals['current_title']);
unset($rss2array_globals['current_link']);
unset($rss2array_globals['current_description']);
return $rss2array_globals;
}
#
# this function will be called everytime a tag starts
#
function startElement($parser, $name, $attrs){
global $rss2array_globals;
$rss2array_globals['current_tag'] = $name;
if($name == "RSS"){
$rss2array_globals['inside_rss'] = true;
}
elseif($name == "RDF:RDF"){
$rss2array_globals['inside_rdf'] = true;
}
elseif($name == "CHANNEL"){
$rss2array_globals['inside_channel'] = true;
$rss2array_globals['channel_title'] = "";
}
elseif(($rss2array_globals['inside_rss'] and $rss2array_globals['inside_channel']) or $rss2array_globals['inside_rdf']){
if($name == "ITEM"){
$rss2array_globals['inside_item'] = true;
}
elseif($name == "IMAGE"){
$rss2array_globals['inside_image'] = true;
}
}
}
#
# this function will be called everytime there is a string between two tags
#
function characterData($parser, $data){
global $rss2array_globals;
if($rss2array_globals['inside_item']){
switch($rss2array_globals['current_tag']){
case "TITLE":
$rss2array_globals['current_title'] .= $data;
break;
case "DESCRIPTION":
$rss2array_globals['current_description'] .= $data;
break;
case "LINK":
$rss2array_globals['current_link'] .= $data;
break;
}
}
elseif($rss2array_globals['inside_image']){
}
elseif($rss2array_globals['inside_channel']){
switch($rss2array_globals['current_tag']){
case "TITLE":
$rss2array_globals['channel_title'] .= $data;
break;
}
}
}
#
# this function will be called everytime a tag ends
#
function endElement($parser, $name){
global $rss2array_globals;
#
# end of item, add complete item to array
#
if($name == "ITEM"){
$rss2array_globals['items'][] = array('title' => trim($rss2array_globals['current_title']), 'link' => trim($rss2array_globals['current_link']), 'description' => trim($rss2array_globals['current_description']));
#
# reset these vars for next loop
#
$rss2array_globals['current_title'] = "";
$rss2array_globals['current_description'] = "";
$rss2array_globals['current_link'] = "";
$rss2array_globals['inside_item'] = false;
}
elseif($name == "RSS"){
$rss2array_globals['inside_rss'] = false;
}
elseif($name == "RDF:RDF"){
$rss2array_globals['inside_rdf'] = false;
}
elseif($name == "CHANNEL"){
$rss2array_globals['channel']['title'] = trim($rss2array_globals['channel_title']);
$rss2array_globals['inside_channel'] = false;
}
elseif($name == "IMAGE"){
$rss2array_globals['inside_image'] = false;
}
}
?>
Variations
Thanks to Joe Ellis for this patch allowing you to read a file from the local filesystem.
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