Operator Tables

Table of PHP Operators

Arithmetic Operators

Example Name Meaning

$x + $y Addition Computes the sum of $x and $y.

$x - $y Subtraction Computes the difference $x minus $y.

$x * $y Multiplication Computes the product $x times $y.

$x / $y Division Computes the floating point quotient $x divided by $y.

$x % $y Mod Computes the remainder of $x divided by $y using integer division.

Concatenation Operator

Example Name Meaning

$x . $y Concatenation Combines $x and $y into a single string.

Example	Name	Meaning
$x + $y	Addition	Computes the sum of $x and $y.
$x - $y	Subtraction	Computes the difference $x minus $y.
$x * $y	Multiplication	Computes the product $x times $y.
$x / $y	Division	Computes the floating point quotient $x divided by $y.
$x % $y	Mod	Computes the remainder of $x divided by $y using integer division.

Example	Name	Meaning
$x . $y	Concatenation	Combines $x and $y into a single string.

Assignment Operators

Example Name Meaning

$x = $y; Assignment Assign $x to $y.

$x += $y; Plus Equal Replace $x by $x + $y.

$x -= $y; Minus Equal Replace $x by $x - $y.

$x *= $y; Times Equal Replace $x by $x * $y.

$x /= $y; Divide Equal Replace $x by $x / $y.

$x %= $y; Mod Equal Replace $x by $x % $y.

$x .= $y; Concatenate Equal Replace $x by $x . $y.

Example	Name	Meaning
$x = $y;	Assignment	Assign $x to $y.
$x += $y;	Plus Equal	Replace $x by $x + $y.
$x -= $y;	Minus Equal	Replace $x by $x - $y.
$x *= $y;	Times Equal	Replace $x by $x * $y.
$x /= $y;	Divide Equal	Replace $x by $x / $y.
$x %= $y;	Mod Equal	Replace $x by $x % $y.
$x .= $y;	Concatenate Equal	Replace $x by $x . $y.

Comparison Operators

Example Name Meaning

$x == $y Equal To $x is equal to $y

$x === $y Identical To $x is equal to $y and they are of the same datatype.

$x != $y Not Equal To $x is not equal to $y

$x <> $y Not Equal To $x is not equal to $y

$x !== $y Not Identical To $x is not equal to $y or they are not of the same datatype

$x < $y Less Than $x is strictly less than $y

$x <= $y Less Than or Equal $x is less than or equal to $y

$x > $y Greater Than $x is strictly greater than $y

$x >= $y Equals $x is greater than or equal to $y

Example	Name	Meaning
$x == $y	Equal To	$x is equal to $y
$x === $y	Identical To	$x is equal to $y and they are of the same datatype.
$x != $y	Not Equal To	$x is not equal to $y
$x <> $y	Not Equal To	$x is not equal to $y
$x !== $y	Not Identical To	$x is not equal to $y or they are not of the same datatype
$x < $y	Less Than	$x is strictly less than $y
$x <= $y	Less Than or Equal	$x is less than or equal to $y
$x > $y	Greater Than	$x is strictly greater than $y
$x >= $y	Equals	$x is greater than or equal to $y

Logical Operators

Example Name Meaning

$x and $y Logical And Returns TRUE if both $x and $y are TRUE, otherwise FALSE.

$x or $y Logical Or Returns TRUE if $x or $y or both are TRUE, otherwise FALSE.

$x xor $y
Logical Exclusive Or
Returns TRUE if $x or $y but not both are TRUE,
otherwise FALSE.

!$x Logical Not Returns FALSE if $x is TRUE, otherwise TRUE.

$x && $y Logical And Returns TRUE if both $x and $y are TRUE, otherwise FALSE.

$x || $y Logical OR Returns TRUE if $x or $y or both TRUE, otherwise FALSE.

Example	Name	Meaning
$x and $y	Logical And	Returns TRUE if both $x and $y are TRUE, otherwise FALSE.
$x or $y	Logical Or	Returns TRUE if $x or $y or both are TRUE, otherwise FALSE.
$x xor $y	Logical Exclusive Or	Returns TRUE if $x or $y but not both are TRUE, otherwise FALSE.
!$x	Logical Not	Returns FALSE if $x is TRUE, otherwise TRUE.
$x && $y	Logical And	Returns TRUE if both $x and $y are TRUE, otherwise FALSE.
$x \|\| $y	Logical OR	Returns TRUE if $x or $y or both TRUE, otherwise FALSE.

Note that even though and has the same meaning as && and or has the same meaning as ||, they have different precedences.