PHP Logical Operators
July 21, 2000
| Operator |
Name |
Description |
Example |
Yield |
and
|
And |
True if both lefthand and righthand expressions
are true. |
(5>2) and (3>2)
(2>5) and (3>2)
|
true
false
|
or
|
Or |
True if either lefthand or righthand expression
is true. |
(5>2) or (2>7)
("h">"a") or (1<3)
|
true
true
|
xor
|
Exclusive Or |
True if either lefthand or righthand expression is
true unless both are true. |
("ar">"ac") xor (9>2)
(3==3) xor ("f"=="f")
|
true
false
|
!
|
Not |
Negates the expression it precedes, true if the expression
is not true. |
!("small"<"smell")
|
false
|
All of these operators can certainly be exhausting!
Just as eye fatigue sets in, a jolt! We're about to string together
everything we've learned so far, with the magic of control statements.
Things get much more exciting from here on in, for those of us excited
by this sort of thing (and who admit it).
PHP Comparison Operators
Welcome to PHP
Control Statements
|
