homepage Welcome to WebmasterWorld Guest from 107.21.187.131
register, free tools, login, search, subscribe, help, library, announcements, recent posts, open posts,
Pubcon Platinum Sponsor 2014
Home / Forums Index / Code, Content, and Presentation / RSS, ATOM, and Related Technologies
Forum Library, Charter, Moderators: bill & werty

RSS, ATOM, and Related Technologies Forum

    
Help Limiting Results
rjbearcan




msg:1543429
 4:41 am on Jun 24, 2005 (gmt 0)

I found an RSS/XML parser so I can add a feed into my site, however I would like to limit the results. I have tried editing the output as well as the $item_counter but with no luck. Can someone give me a hand?

Here is the code:

<?php
set_time_limit(0);
$file = "http://news.search.yahoo.com/news/rss?p=Jelena+Jankovic&ei=UTF-8&fl=0&x=wrt";
$rss_channel = array();
$currently_writing = "";
$main = "";
$item_counter = 0;

function startElement($parser, $name, $attrs) {
global $rss_channel, $currently_writing, $main;
switch($name) {
case "RSS":
case "RDF:RDF":
case "ITEMS":
$currently_writing = "";
break;
case "CHANNEL":
$main = "CHANNEL";
break;
case "IMAGE":
$main = "IMAGE";
$rss_channel["IMAGE"] = array();
break;
case "ITEM":
$main = "ITEMS";
break;
default:
$currently_writing = $name;
break;
}
}

function endElement($parser, $name) {
global $rss_channel, $currently_writing, $item_counter;
$currently_writing = "";
if ($name == "ITEM") {
$item_counter++;
}
}

function characterData($parser, $data) {
global $rss_channel, $currently_writing, $main, $item_counter;
if ($currently_writing!= "") {
switch($main) {
case "CHANNEL":
if (isset($rss_channel[$currently_writing])) {
$rss_channel[$currently_writing] .= $data;
} else {
$rss_channel[$currently_writing] = $data;
}
break;
case "IMAGE":
if (isset($rss_channel[$main][$currently_writing])) {
$rss_channel[$main][$currently_writing] .= $data;
} else {
$rss_channel[$main][$currently_writing] = $data;
}
break;
case "ITEMS":
if (isset($rss_channel[$main][$item_counter][$currently_writing])) {
$rss_channel[$main][$item_counter][$currently_writing] .= $data;
} else {
$rss_channel[$main][$item_counter][$currently_writing] = $data;
}
break;
}
}
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
if (!($fp = fopen($file, "r"))) {
die("could not open XML input");
}

while ($data = fread($fp, 4096)) {
if (!xml_parse($xml_parser, $data, feof($fp))) {
die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser)));
}
}
xml_parser_free($xml_parser);

// output HTML

if (isset($rss_channel["ITEMS"])) {
if (count($rss_channel["ITEMS"]) > 0) {
for($i = 0;$i < count($rss_channel["ITEMS"]);$i++) {
if (isset($rss_channel["ITEMS"][$i]["LINK"])) {
print ("\n<div class=\"itemtitle\"><a href=\"" . $rss_channel["ITEMS"][$i]["LINK"] . "\">" . $rss_channel["ITEMS"][$i]["TITLE"] . "</a></div>");
} else {
print ("\n<div class=\"itemtitle\">" . $rss_channel["ITEMS"][$i]["TITLE"] . "</div>");
}
print ("<div class=\"itemdescription\">" . $rss_channel["ITEMS"][$i]["DESCRIPTION"] . "</div><br />"); }
} else {
print ("<b>There are no articles in this feed.</b>");
}
}
?>

Thanks a lot!

 

Burner




msg:1543430
 7:06 am on Jun 24, 2005 (gmt 0)

Hi there! I'll try to help,

Here's your code

for($i = 0;$i < count($rss_channel["ITEMS"]);$i++) {
if (isset($rss_channel["ITEMS"][$i]["LINK"])) {
print ("\n<div class=\"itemtitle\"><a href=\"" . $rss_channel["ITEMS"][$i]["LINK"] . "\">" . $rss_channel["ITEMS"][$i]["TITLE"] . "</a></div>");

Try something like this to limit your results to 25,

if (count($rss_channel["ITEMS"]) > 25) {$NumberOfItems = 25;}
else {$NumberOfItems = count($rss_channel["ITEMS"]);}
for($i = 0;$i < $NumberOfItems;$i++) {
if (isset($rss_channel["ITEMS"][$i]["LINK"])) {
print ("\n<div class=\"itemtitle\"><a href=\"" . $rss_channel["ITEMS"][$i]["LINK"] . "\">" . $rss_channel["ITEMS"][$i]["TITLE"] . "</a></div>");

Keep in mind you should cache the results you retrieve. It's considered bad manners to download an RSS feed more than once an hour.

Burner

rjbearcan




msg:1543431
 11:51 am on Jun 24, 2005 (gmt 0)

Thanks burner, it works perfectly. I will keep that in mind about caching the results.

Global Options:
 top home search open messages active posts  
 

Home / Forums Index / Code, Content, and Presentation / RSS, ATOM, and Related Technologies
rss feed

All trademarks and copyrights held by respective owners. Member comments are owned by the poster.
Home ¦ Free Tools ¦ Terms of Service ¦ Privacy Policy ¦ Report Problem ¦ About ¦ Library ¦ Newsletter
WebmasterWorld is a Developer Shed Community owned by Jim Boykin.
© Webmaster World 1996-2014 all rights reserved