I have this bit of code here and I want to sort the $lessons array by the 'available' field. The array itself contains the lesson ID and the time when the due to start in epoch. I want to sort the time with the first one being the one that is due to start the soonest. I've looked around on the internet but I still don't understand how to use the different sorting functions...
Any help would be great.
$lessons = array();
foreach($lessonsArray as $lesson)//for each lesson get the starting time and its lesson id
{
$lessons[] = array( 'id' => $lesson['id'], 'available' => $lesson['available']);
}