# PHP Operators

PHP Operators are used to perform operations on operands. Operands can be a variable or a constant. The operators are divided into various groups on the basis of the basic operations they perform.

Arithmetic Operators:

The operators which are used to perform the arithmetical operations, are grouped together as Arithmetic operators.

 Operators Symbol Addition + Subtraction – Multiplication * Division / Modulus % Exponentiation **

Assignment Operators:

The operators which are used to assign values to a variable, are grouped together as Assignment operators.

 Operators Symbol Equals To = Added Value += Subtracted Value -= Multiplicated Value *= Divided Value /= Modulus Value %=

Comparison Operators:

The operators which are used to compare two values, are grouped together as Comparison operators.

 Operators Symbol Equal == Identical === Not equal !=, <> Not identical !== Greater than > Less than < Greater than or equal to >= Less than or equal to <=

Increment/ Decrement Operators:

The operators which are used to increment or decrement the value of a variable, are grouped together as Increment and Decrement operators.

 Operators Symbol Pre-Increment ++$x Post-Increment$x++ Pre-Decrement –$x Post-Decrement$x–

Logical Operators:

The operators which are used to perform logical operations, are grouped together as Logical operators.

 Operators Symbol AND And, && OR Or, || XOR xor NOT !

String Operators:

The operators which are used to perform operations on string, are grouped together as String operators.

 Operators Symbol Concatenation . Concatenation assignment .=

Array Operators:

The operators which are used to perform operations on array, are grouped together as Array operators.

 Operators Symbol Union + Equality == Identity === Inequality !=, <> Non-Identity !==

Example:

<!DOCTYPE html> <html> <body>   <?php $txt1 = "Sum of 1234 and 4321 is:";$txt2 = “Difference of 1234 and 4321 is:"; $txt3 = “Product of 1234 and 4321 is:";$txt4 = “Quotient of 1234 and 4321 is:";   $x = 1234;$y = 4321;   echo "<h3>" . $txt1 . "</h3>"; echo$x + $y; echo "<h3>" .$txt2 . "</h3>"; echo $x -$y;   echo "<h3>" . $txt3 . "</h3>"; echo$x * $y; echo "<h3>" .$txt4 . "</h3>"; echo $x /$y;   ?>   </body> </html>