TUTORIALS

## PHP Basic

PHP HOME
PHP Intro
PHP Install
PHP Syntax
PHP Variables
PHP String
PHP Operators
PHP If...Else
PHP Switch
PHP Arrays
PHP While Loops
PHP For Loops
PHP Functions
PHP Forms
PHP \$_GET
PHP \$_POST

PHP Date
PHP Include
PHP File
PHP Sessions
PHP E-mail
PHP Secure E-mail
PHP Error
PHP Exception
PHP Filter

## PHP Database

MySQL Introduction
MySQL Connect
MySQL Create
MySQL Insert
MySQL Select
MySQL Where
MySQL Order By
MySQL Update
MySQL Delete
PHP ODBC

XML Expat Parser
XML DOM
XML SimpleXML

AJAX Intro
AJAX PHP
AJAX Database
AJAX XML
AJAX Live Search
AJAX Poll

PHP Array
PHP Calendar
PHP Date
PHP Directory
PHP Error
PHP Filesystem
PHP Filter
PHP FTP
PHP HTTP
PHP Libxml
PHP Mail
PHP Math
PHP Misc
PHP MySQL
PHP SimpleXML
PHP String
PHP XML
PHP Zip

PHP Quiz
PHP Exam

# PHP Operators

Operators are used to operate on values.

## PHP Operators

This section lists the different operators used in PHP.

Arithmetic Operators

Operator Description Example Result
x+2
4
- Subtraction x=2
5-x
3
* Multiplication x=4
x*5
20
/ Division 15/5
5/2
3
2.5
% Modulus (division remainder) 5%2
10%8
10%2
1
2
0
++ Increment x=5
x++
x=6
-- Decrement x=5
x--
x=4

Assignment Operators

Operator Example Is The Same As
= x=y x=y
+= x+=y x=x+y
-= x-=y x=x-y
*= x*=y x=x*y
/= x/=y x=x/y
.= x.=y x=x.y
%= x%=y x=x%y

Comparison Operators

Operator Description Example
== is equal to 5==8 returns false
!= is not equal 5!=8 returns true
<> is not equal 5<>8 returns true
> is greater than 5>8 returns false
< is less than 5<8 returns true
>= is greater than or equal to 5>=8 returns false
<= is less than or equal to 5<=8 returns true

Logical Operators

Operator Description Example
&& and x=6
y=3

(x < 10 && y > 1) returns true

|| or x=6
y=3

(x==5 || y==5) returns false

! not x=6
y=3

!(x==y) returns true