Reference — What does this symbol mean in PHP?
Incrementing / Decrementing Operators ++ increment operator — decrement operator Example Name Effect ——————————————————————— ++$a Pre-increment Increments $a by one, then returns $a. $a++ Post-increment Returns $a, then increments $a by one. –$a Pre-decrement Decrements $a by one, then returns $a. $a– Post-decrement Returns $a, then decrements $a by one. These can go before or … Read more