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Logical Operators (Perl and PHP Cross Reference Guide)

By Mike Prestwood

Perl versus PHP: A side by side comparison between Perl and PHP.

 
Operators
 

A language symbol used for assignment, comparison, computational, or as a logical.

Logical Operators

[Other Languages] 

Languages Focus

Logical operators perform conditional and, or, and not operations. Some languages support both binary logical operators that link two and unary logical operators negate (make opposite) the truth value of its argument. Finally, some languages short circuit logic. For example, with this or that, if this is an expression returning true, then that is never executed.

Perl: 

Perl logical operators:

&& or and and, as in this and that
|| or or or, as in this or that
! Not, as in Not This

Syntax Example:
#Given expressions a, b, c, and d:
if !((a && b) && (c || d)) {
  #Do something.
}
PHP:   and, &&, or, ||, !, Xor

PHP logical operators:

and, && and, as in this and that
or, || or, as in this or that
! Not, as in Not This
Xor either or, as in this or that but not both

Syntax Example:
#Given expressions a, b, c, and d:
if !((a && b) && (c || d)) {
  #Do something.
};












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