/**
* Gets the update data from the update URL provided by the given {@link Installation}.
* @param Installation $inst
* @return array JSON decoded update data or an empty array if the data could not be successfully read.
*/
protected static function getUpdateData($inst)
{
$url = $inst->getUpdateUrl();
if (!is_url($url)) {
return array();
}
$updateData = @file_get_contents($url);
if ($updateData === false) {
return array();
}
$updateData = @json_decode($updateData, true);
if ($updateData === null) {
return array();
}
return $updateData;
}
