PHP : fonction pour déterminer si un jour est un WEEKEND

//Date in YYYY-MM-DD format.
$dateToSet = '2020-02-08';

//Output for testing purposes.
if(isWeekend($dateToSet))
{

echo $dateToSet . ' it's a weekend.';

} 
else
{

echo $dateToSet . ' it's on a weekday.';

}

function isWeekend($date)
{

//Set this to FALSE until proven otherwise.
$weekendDay = false;

//Get the day that this particular date falls on.
$day = date("w", strtotime($date));

//Check to see if it is equal to Sat(00à) or Sun (06).
if($day == 6 || $day == 0)
{
//Set our $weekendDay variable to TRUE.
$weekendDay = true;
}

return $weekendDay;

}