HOME
PHP
Introduction
Php Installation
PHP Basic Scripts
PHP variables
PHP operators
PHP Conditional statement
PHP functions
PHP Arrays
PHP Objects & classes
PHP with Forms
PHP Files
PHP With Database
PHP session
PHP cookies
PHP Regular Expressions
PHP Server Environment
PHP Graphics
PHP Advance
|
PHP Operators
OPERATORS ARE THE SYMBOL THAT MAKES IT POSSIBLE TO USE ON EOR MORE VALUES TO PRODUCE A NEW VALUE.
A VALUE THAT IS OPERATED ON BY AN OPERATOR IS AN OPEREND.
OPERATORAn operator is a symbol thst when used in conjuction with values,performs an action and usually produces a new value
OPERANDAn operand is avalue used in conjuction with an opearator.there are usually two operands to one operator.
example
4+5
Lets combine two operands with an operator to produce new value 9.
in this 4,5 are operands
+ is a operator
|
Different operators used in PHP.
Arithmetic Operators
| Operator |
Description |
Example |
Result |
| + |
Addition |
x=2
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 |
Comparison Operators
| Operator |
Description |
Example |
| == |
is equal to |
5==8 returns false |
| != |
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 |
|
|
| |