PHP + RSS duplicate elements - php

Question

Im using this PHP to get a list of Title's from an RSS feed:
<?php require_once('magpie/rss_fetch.inc');
$rss = fetch_rss('http://live.visitmix.com/Sessions/RSS');
foreach ($rss->items as $item) {
$cat = $item['category'];
$title = $item['title'];
echo '<li class="'.$cat.'">'.$title.'</li>';
}
?>
I want to use <category> and add it as the class, however the <category> element appears for each <item> 1,2,3,4 or more times depending on the Title. How can I take the category element and seperate each category with a space if there is more than 1?

Answer 1

what about accumulating the categories in an array and then implode the array?
$categoriesArray = array();
foreach ($rss->items as $item) {
array_push($categoriesArray, $item['category']);
}
$categories = implode(" ", $categoriesArray);
EDIT TO ADD
If the categories are cumulated, you can try something like this:
$categoriesByTitle = array();
foreach ($rss->items as $item) {
$currentTitle = $item['title'];
$categories = $categoriesByTitle[$currentTitle];
if ($categories == NULL) {
$categories = array();
$categoriesByTitle[$currentTitle] = $categories;
}
if (!in_array($item['category'], $categories)) {
array_push($categories, $item['category']);
}
}
foreach ($categoriesByTitle as $title=>$category) {
// use implode for each title
$categoryString = implode(" ", $category);
echo '<li class="'.$categoryString.'">'.$title.'</li>';
}
Check this reference for arrays, it could be very useful for dealing with this kind of problems