Operator Example Description
+ $a = 3 + 4; Add
- $a = 34; Subtract
* $a = 3 * 4; Multiply
/ $a = 3 / 4; Divide
** $a = 2 ** 4; Raise the power
% $a = 36 % 8; Modulo the expression on the left of the operator by the expression on the right of the operator.