#php #PHP/operators/increase operator, decrease operator ++$a Returns $a after increasing the value. for example $a = 1; echo ++$a; will output 2. $a++ After returning $a , increment the value. for example $a = 1; echo $a++; will output 1 and the value of $a will be 2. --$a Returns $a after decrementing the value. for example $a = 1; echo --$a; will output 0. $a-- Decrease the value after return..