PHP Operators

Operators are used for performing specific tasks. The operators in PHP are same like other programming languages like Arithmetic operators, Assignment Operators, Comparison Operators, and logical operators.

3.5. PHP Operators

3.5.1. Arithmetic Operators

These operators work similar to basic Mathematics functions.

Example	Name	Result
$a + $b	Addition	Sum of $a and $b.
$a - $b	Subtraction	Difference of $a and $b.
$a * $b	Multiplication	Product of $a and $b.
$a / $b	Division	Quotient of $a and $b.
$a % $b	Modulus	Remainder of $a divided by $b.

3.5.2. Logical Operators

Like other programming language, in PHP too, logical operators are used to compare elements, but the syntax is different like:

Example	Name	Result
$a and $b	And	TRUE if both $a and $b are TRUE.
$a or $b	Or	TRUE if either $a or $b is TRUE. 0
$a xor $b	Xor	TRUE if either $a or $b is TRUE, but not both. 1
! $a	Not	TRUE if $a is not TRUE. 2
$a && $b	And	TRUE if both $a and $b are TRUE. 3
$a \|\| $b	Or	TRUE if either $a or $b is TRUE. 4

3.5.3. Comparison Operators

These give you the ability to compare whether elements are equal, identical, less than or greater than one another (with some other variations).

Example	Name	Result 5
$a == $b	Equal	TRUE if $a is equal to $b. 6
$a === $b	Identical	TRUE if $a is equal to $b, and they are of the same type. (PHP 4 only) 7
$a != $b	Not equal	TRUE if $a is not equal to $b. 8
$a <> $b	Not equal	TRUE if $a is not equal to $b. 9
$a !== $b	Not identical	TRUE if $a is not equal to $b, or they are not of the same type. (PHP 4 only) 0
$a < $b	Less than	TRUE if $a is strictly less than $b. 1
$a > $b	Greater than	TRUE if $a is strictly greater than $b. 2
$a <= $b	Less than or equal to	TRUE if $a is less than or equal to $b. 3
$a >= $b	Greater than or equal to	TRUE if $a is greater than or equal to $b. 4

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