freeCodeCamp/guide/english/php/php-operators/index.md

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PHP Operators

PHP Operators

Operators are used to perform operations on variables and values.

PHP divides the operators in the following groups:

• Arithmetic operators
• Assignment operators
• Comparison operators
• Increment/Decrement operators
• Logical operators
• String operators
• Array operators

PHP Arithmetic Operators

The PHP arithmetic operators are used with numeric values to perform common arithmetical operations, such as addition, subtraction, multiplication etc.

Operator	Name	Example	Result
+	Addition	$a + $b	Sum of $a and $b
-	Subtraction	$a - $b	Difference of $a and $b
*	Multiplication	$a * $b	Product of $a and $b
/	Division	$a / $b	Quotient of $a and $b
%	Modulus	$a % $b	Remainder of $a divided by $b
**	Exponentiation	$a ** $b	Result of raising $a to the $b'th power

PHP Comparison Operators

The PHP comparison operators are used to compare two values

Operator	Name	Example	Result
==	Equal	$a == $b	Returns true if $a is equal to $b
===	Identical	$a === $b	Returns true if $a is equal to $b, and they are the same type
!=	Not equal	$a != $b	Returns true if $a is not equal to $b
<>	Not equal	$a <> $b	Returns true if $a is not equal to $b
!==	Not identical	$a !== $b	Returns true if $a is not equal to $b, or they are different types
>	Greater than	$a > $b	Returns true if $a is greater than $b
<	Less than	$a < $b	Returns true if $a is less than $b
>=	Greater than or equal to	$a >= $b	Returns true if $a is greater than or equal to $b
<=	Less than or equal to	$a <= $b	Returns true if $a is less than or equal to $b
<=>	Spaceship	$a <=> $b	Returns an integer less than, equal to, or greater than zero when $a is respectively less than, equal to, or greater than $b.

Note: Spaceship operator is available as of PHP 7+

Spaceship example

echo 1 <=> 0; // returns 1
echo 1 <=> 1; // returns 0
echo 1 <=> 2; // returns -1

More Information:

• Arithmetic Operators
• Assignment Operators