PHP 8 - PHP Operators

Operators are used to perform operations on variables and values.

In PHP, we have following operators.

1. Arithmetic operators
2. Assignment operators
3. Comparison operators
4. Increment/Decrement operators
5. Logical operators
6. String operators

1. Arithmetic operators

Operator	Name	Example	Output
+	Addition	6+5	11
-	Subtraction	9-6	3
*	Multiplication	2*5	10
/	Division	8/2	4
%	Modulus	9/2	1
**	Exponentiation	8**2	64

2. Assignment operators

Operator	Name	Example	Output
x = ?	Assignment	$x = 6	6
x += ?	Addition	$x = 10; $+=2	12
X -= ?	Subtraction	$x =5; $x-=3	2
X *=?	Multiplication	$x=2;$x*=5	10
X /=?	Division	$x=10; $x/=2	5
X %=?	Modulus	$x=9; $x%=2	1

3. Comparison Operators

Operator	Name	Example	Output
==	Equal	5 = '5'	True or 1
===	Identical	5 = '5'	False or 0
!=	Not equal	5 != 6	True or 1
<>	Not equal	5 <> 6	True or 1
!==	Not identical	5 !== '5'	False or 0
>	Greater than	5 > 6	False or 0
<	Less than	4 < 5	True or 1
>=	Greater than or equal to	5 >= 5	True or 1
<=	Less than or equal to	3 >= 5	False or 0

4. Increment / Decrement Operators

Operator	Name	Description
++$x	Pre-increment	Increments first x by one and return
$x++	Post-increment	Return x and increments by one
--$x	Pre-decrement	Decrement first x by one and return
$x--	Post-decrement	Return x and decrement by one

5. Logical operators

$x = 5
$y = 6

Operator	Name	Example	Result
and	And	if($x == 5 and $y == 7)	False
or	Or	if($x == 5 or $y == 7)	True
&&	And	if($x == 5 && $y == 7)	False
||	Or	if($x == 5 || $y == 7)	True
!	Not	if(!x == 5)	True

6. String Operators

Operator	Name	Example	Output
.	Concatenation	$txt1 . $txt2	Concatenation of $txt1 and $txt2
.=	Concatenation assignment	$txt1 .= $txt2	Appends $txt2 to $txt1