A very common type of expressions are comparison
expressions. These expressions evaluate to either FALSE or TRUE. PHP
supports > (bigger than), >= (bigger than or equal to), == (equal),
!= (not equal), < (smaller than) and <= (smaller than or equal to).
The language also supports a set of strict equivalence operators: ===
(equal to and same type) and !== (not equal to or not same type).
These expressions are most commonly used inside conditional execution,
such as if statements.