How does PHP handle internal classes like DateTime differently when it comes to operator overloading compared to user-defined classes?

PHP does not allow operator overloading for internal classes like DateTime. This means you cannot directly use arithmetic operators like + or - with DateTime objects as you would with user-defined classes. To work around this limitation, you can use the DateTime methods provided by PHP to perform date and time calculations. 

$date1 = new DateTime('2022-01-01');
$date2 = new DateTime('2022-01-10');

// Calculate the difference in days between two dates
$interval = $date1->diff($date2);
echo $interval->days;

Keywords

PHP internal classes DateTime operator overloading user-defined classes

Related Questions