Now that you have data values to work with, you need some operators to use, too. You have already used
+ to add variables together, but many others in PHP handle arithmetic, comparison, assignment, and other operators. Operator is just a fancy word for something that performs an operation, such as addition or subtraction. However, operand might be new to you. Consider this operation:
$a = $b + c;
In this operation,
+ are operators, and
$c are operands. Along with
+, you also already know – (subtract),
* (multiply), and
/ (divide), but Table 39.2 provides some more.
At least 10 other operators ...