protected function FetchItems($arrURLs, $numItems = 1)
{
// since 1.1.4
$strURLID = md5(serialize(is_string($arrURLs) ? array($arrURLs) : $arrURLs));
if (!isset($this->arrFeedItems[$strURLID])) {
$this->arrFeedItems[$strURLID] = (array) get_transient('RCWUserAds_' . $strURLID);
unset($this->arrFeedItems[$strURLID][0]);
// casting array causes the 0 key,
}
// If it's out of stock, fill the array by fetching the feed.
if (count($this->arrFeedItems[$strURLID]) < $numItems) {
$oReplace = new ResponsiveColumnWidgets_HTMLElementReplacer($this->strCharSet);
// When an array of urls is passed to the Simple Pie's set_feed_url() method, the memory usage increases largely.
// So fetch the feeds one by one per url and store the output into an array.
foreach ($arrURLs as $strURL) {
$oFeed = $this->GetFeedObj($strURL, $numItems * 20);
// multiplied by X to store items more than enough for next calls.
foreach ($oFeed->get_items() as $item) {
// foreach ( $oFeed->get_items( 0, $numItems * 3 ) as $item ) does not change the memory usage
$this->arrFeedItems[$strURLID][] = $oReplace->Perform($item->get_content());
}
// For PHP below 5.3 to release the memory.
$oFeed->__destruct();
// Do what PHP should be doing on it's own.
unset($oFeed);
}
unset($oReplace);
// This life span should be little longer than the feed cache life span, which is 1700.
set_transient('RCWUserAds_' . $strURLID, $this->arrFeedItems[$strURLID], 1800);
// 30 minutes
}
$strOut = '';
shuffle($this->arrFeedItems[$strURLID]);
for ($i = 1; $i <= $numItems; $i++) {
$strOut .= array_pop($this->arrFeedItems[$strURLID]);
}
return $strOut;
}
