PHP - logical and: &&, and

logical and works as follows: just in case it's true if both inputs are true in all other situations the result is false. In next table you can find all possibilities:
abx
FalseFalseFalse
FalseTrueFalse
TrueFalse False
True True True
information about the table: a, b are inputs, x is result

&&

Description

par1 && par2
Used keywords: &&

Input


Output

if the first operand is false, then the second operand is not evaluated.

Examples

PHP

in the source code you can find the equivalent of the above table, for easier orientation at the end of each line is a comment which shows the result.
$a1 = false && false; // a1 = false
$a2 = false && true; // a2 = false
$a3 = true && false; // a3 = false
$a4 = true && true;  // a4 = true

PHP

even one example in what situations we can use the operation logical and:
$a && $b
$a && true
10 >$a && $a>5

PHP

Other pieces of example codes:
$b2= $x && $y
$a && $b
!$b && true

and

Description

par1 and par2
Used keywords: and

Input


Output

if the first operand is false, then the second operand is not evaluated.

Examples

PHP

in the source code you can find the equivalent of the above table, for easier orientation at the end of each line is a comment which shows the result.
$a1 = false and false; // a1 = false
$a2 = false and true; // a2 = false
$a3 = true and false; // a3 = false
$a4 = true and true;  // a4 = true

PHP

even one example in what situations we can use the operation logical and:
$a and $b
$a and true
10 >$a and $a>5

you can find it in the following collections: logical operators
Languages: en hu cz sk