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Operators in PHP

There are following Operators are used in PHP.

  1. Arithmetic operators
  2. Assignment operators
  3. Comparison operators
  4. Increment/Decrement operators
  5. Logical operators
  6. String operators
  7. Array operators

1) PHP Arithmetic Operators .

PHP Arithmetic operators are used to mathematical operation uch as addition, subtraction, multiplication etc.

Operator Description Example Result
+ Addition $x + $y Sum of $x and $y
- Subtraction $x - $y Difference of $x and $y.
* Multiplication $x * $y Product of $x and $y.
/ Division $x / $y Quotient of $x and $y
% Modulus $x % $y Remainder of $x divided by $y

Example :-

Output

 14
6
40
2.5
2

2) PHP Assignment Operators

The assignment operators are used to assign values to variables..

assignment operator in PHP is "=" .

Example :-

Output

 5
 30
 30
 125
 5
 10

3) PHP Comparison Operators

comparison operators are used to compare Boolean value true or false .

Operator Name Example Result
== Equal $x == $y True if $x is equal to $y
=== Identical $x === $y True if $x is equal to $y, and they are of the same type
!= Not equal $x != $y True if $x is not equal to $y
<> Not equal $x <> $y True if $x is not equal to $y
!== Not identical $x !== $y True if $x is not equal to $y, or they are not of the same type
< Less than $x < $y True if $x is less than $y
> Greater than $x > $y True if $x is greater than $y
>= Greater than or equal to $x >= $y True if $x is greater than or equal to $y
<= Less than or equal to $x <= $y True if $x is less than or equal to $y

Example :-

Output

 bool(true) 
bool(false) 
bool(true) 
bool(true) 
bool(true) 
bool(false) 
bool(true) 
bool(false)

4) PHP Incrementing and Decrementing Operators

Increment operators are used to increment a variable's value.

Decrement operators are used to decrement a variable's value

Operator Name Effect
++$x Pre-increment Increments $x by one, then returns $x
$x++ Post-increment Returns $x, then increments $x by one
--$x Pre-decrement Decrements $x by one, then returns $x
$x-- Post-decrement Returns $x, then decrements $x by one

Example :-

Output

6
6 
10
11
19
19
30
29

5) PHP Logical Operators

PHP logical operators are used to conditional statements.

Operator Name Example Result
and And $x and $y True if both $x and $y are true
or Or $x or $y True if either $x or $y is true
xor Xor $x xor $y True if either $x or $y is true, but not both
&& And $x && $y True if both $x and $y are true
|| Or $x || $y True if either $$x or $y is true
! Not !$x True if $x is not true

Example :-

Output

 2020 is a leap year.

6) PHP String Operators

PHP has two operators that are designed for strings.

Operator Description Example Result
. Concatenation $str1 . $str2 Concatenation of $str1 and $str2
.= Concatenation assignment $str1 .= $str2 Appends the $str2 to the $str1

Example :-

Output

Hello World!
Hello World!

7) PHP Array Operators

Array operators are used to compare arrays:

Operator Name Example Result
+ Union $x + $y Union of $x and $y
== Equality $x == $y True if $x and $y have the same key/value pairs
=== Identity $x === $y True if $x and $y have the same key/value pairs in the same order and of the same types
!= Inequality $x != $y True if $x is not equal to $y
<> Inequality $x <> $y True if $x is not equal to $y
!== Non-identity $x !== $y True if $x is not identical to $y

Example :-

Output

 array(6) {
  ["a"]=>
  string(3) "Red"
  ["b"]=>
  string(5) "Green"
  ["c"]=>
  string(4) "Blue"
  ["u"]=>
  string(6) "Yellow"
  ["v"]=>
  string(6) "Orange"
  ["w"]=>
  string(4) "Pink"
}

bool(false)

bool(false)

bool(true)

bool(true)

bool(true)
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