PHP - Operators

There are 5 categories of operators in PHP

• Assignment Operators
• Arithmetic Operators
• Comparison Operators
• String Operators
• Combination Arithmetic & Assignment Operators

Assignment operators are used to set a variable equal to a value or set a variable to another variable's value.

Example:

$my_var = vn4000;

Arithmetic Operators

Operator	English	Example
+	Addition	2 + 4
-	Subtraction	6 - 2
*	Multiplication	5 * 3
/	Division	15 / 3
%	Modulus	43 % 10

Comparison Operators

Comparisons are used to check the relationship between variables and/or values.

Operator	English	Example	Result
==	Equal To	$x == $y	false
!=	Not Equal To	$x != $y	true
<	Less Than	$x < $y	true
>	Greater Than	$x > $y	false
<=	Less Than or Equal To	$x <= $y	true
>=	Greater Than or Equal To	$x >= $y	false

String Operators

The period "." is used to add two strings together. Example

<?php
$a_string = "Hello";
$another_string = " vn4000";
$new_string = $a_string . $another_string;
echo $new_string . "!";
?>