07 Jul PHP Operators

PHP Operators perform operations by taking one or more values, to give another value. These operations are performed on variables and values.

For example:  $a + $b,  $a – $b, $a = $b

The types of operators are explained here with an example, where $a = 5, $b =10. The following are the operators in PHP:

• Arithmetic Operators
• Assignment Operators
• Relational Operators
• Logical Operators
• Increment/ Decrement Operators
• String Operators

PHP Arithmetic operators

Arithmetic operators perform arithmetical operations, such as addition, subtraction, division, multiplication, etc.

Operator	Name	Example
+	Addition	$a + $b
-	Subtraction	$a - $b
*	Multiplication	$a * $b
/	Division	$a / $b
%	Modulus	$a % $b
**	Exponentiation	$a ** $b

PHP Assignment operators

Use the Assignment Operator when you need to assign a value to a variable. Assignment means assigning the value of the right operand(s) to the left operand.

Operator	Name	Example
=	Assignment	$a = $b
+=	Add AND assignment	$a += $b is same as $a = $a + $b
-=	Subtract AND assignment	$a -= $b is same as $a = $a - $b
*=	Multiply AND assignment	$a *= $b is same as $a = $a * $b
/=	Divide AND assignment	$a /= $b is same as $a = $a / $b
%=	Modulus AND assignment	$a % $b is same as $a = $a % $b

PHP Relational operators

Compare two values with PHP relational operators.

Operator	Name	Example
==	Equal	$a == $b isn’t true
!=	Not Equal	$a != $b returns true
>	Greater Than	$a > $b isn’t true
<	Less Than	$a < $b is true
>=	Greater than or equal to	$a >= $b isn’t true
<=	Less than or equal to	$a <= $b is true

PHP Logical operators

Logical operators combine conditional statements.

Operator	Name	Example
And	Logical AND operator	$a and $b is true if both $a and $b are true
Or	Logical OR operator	$a or $b is true either $a or $b is true
Xor	Logical XOR operator	$a xor $b is true if either $a or $b is true (not both)
&&	Logical AND operator	$a && $b is true if $a and $b are both true
||	Logical OR Operator	$a || $b is true if either $a or $b is true
!	Logical NOT Operator	!$a is true if $a is not true

PHP Increment/ Decrement operators

Increment and decrement a variable’s value with Increment and Decrement operators respectively.

Operator	Name	Example
++$a	Increment (Pre)	$a increments, then returns
$a++	Increment (Post)	Returns $a, then increments
--$a	Decrement (Pre)	$a decrements, then returns
$a--	Decrement (Post)	Returns $a, then decrements

PHP String operators

Here are the operators for strings. Let’s say, we have the following two strings,

The following are the string operators:

Operator	Name	Example
.	Concatenation	$str1 . $str2
.=	Concatenation assignment	$str1 .= $str2