# PHP Operators

Operators are used to perform some actions on variables and values. There are 7 types of operators.

1.Arithmetic Operator

This operator is used with numerical values so that one can get value of a particular value.

Syntax:
Addition- $a +$b
Subtraction- $a –$b
Multiplication- $a *$b
Division- $a /$b
Modulus- $a %$b
Exponentiation- $a **$b

2. Assignment Operator

It is used with numerical values when some need to write the value of a particular variable.

Syntax:

a = b a = b Left operand shifts to right operand
a += b a = a + b Addition
a -= b a = a – b Subtraction
a *= b a = a * b Multiplication
a /= b a = a / b Division
a %= b a = a % b Modulus

3.Comparison Operator

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

4.Increment or Decrement Operator

++$x Pre-increment$x++ Post-increment
–$x Pre-decrement$x– Post-decrement

5. Logical

And $x and$y
Or $x or$y
Xor $x xor$y
And $x &&$y
Or $x ||$y
Not !$x 6. String Operator . Concatenation$txt1 . $txt2 .= Concatenation assignment$txt1 .= $txt2 7. Array It is used to compare arrays with each other + Union$x + $y == Equality$x == $y === Identity$x === $y != Inequality$x != $y <> Inequality$x <> $y !== Non-identity$x !== \$y