Description
The PHP operators are used to perform the operations in PHP.
The list of PHP operators
- Arithmetic operators
- Logical operators
- Increment/Decrement operators
- Assignment operators
- Comparison operators
Description
Arithmetic operators are used to perform the arithmetic operations in PHP like addition, subtraction, multiplication and division.
Examples
[php]
<?php
$x = 30;
$y = 40;
echo $x+$y; //70
?>
[/php]
[php]
<?php
$x = 30;
$y = 40;
echo $x-$y; //-10
?>
[/php]
[php]
<?php
$x = 30;
$y = 40;
echo $x*$y; //1200
?>
[/php]
[php]
<?php
$x = 30;
$y = 40;
echo $x/$y; //0.75
?>
[/php]
[php]
<?php
$x = 40;
$y = 30;
echo $x%$y; //10
?>
[/php]
[php]
<?php
$x = 4;
$y = 3;
echo $x**$y; //10
?>
[/php]
Description
In PHP, conditional statements are used as logical operators.
| Name | Example | Details |
|---|---|---|
| And | $a and $b | Returns TRUE when both $a and $b are TRUE. |
| Or | $a or $b | Returns TRUE when either $a or $b is TRUE. |
| Xor | $a xor $b | Returns TRUE when either $a or $b is TRUE, but not both. |
| Not | !$a | Returns TRUE when $a is not TRUE. |
| And | $a && $b | Returns TRUE when both $a and $b are TRUE. |
| Or | $a || $b | Returns TRUE when either $a or $b is TRUE. |
Examples
[php]
<?php
$x = 30;
$y = 40;
if($x == 60 || $y == 40)
{
echo "SP Lessons"; //SP Lessons
}
?>
[/php]
[php]
<?php
$x = 30;
$y = 40;
if($x==30&&$y==40)
{
echo "SP Lessons"; //SP Lessons
}
?>
[/php]
[php]
<?php
$x = 30;
$y = 40;
if($x!==120)
{
echo "SP Lessons"; //SP Lessons
}
?>
[/php]
Description
Increment and Decrement Operators increments or decrements the value assigned to a variable by 1.
| Operators | Operator type | Description |
|---|---|---|
| ++$x | Pre-increment | $x value is incremented before assigning it to variable $x |
| $x++ | Post-increment | $x is incremented after assigning it to variable $x |
| – -$x | Pre-decrement | $x value decremented before assigning it to variable $x |
| $x- – | Post-decrement | $x value decremented after assigning it to variable $x |
Example
[php]
<?php
$x = 5;
echo "Should be 5: " . $x++ . "<br />"; //5
echo "Should be 6: " . $x . "<br />"; //6
?>
[/php] [php]
<?php
$x = 5;
echo "Should be 5: " . ++$x . "<br />"; //6
echo "Should be 6: " . $x . "<br />"; //5
?>
[/php] [php]
<?php
$x = 5;
echo "Should be 5: " . $x– . "<br />"; //5
echo "Should be 6: " . $x . "<br />"; //4
?>
[/php] [php]
<?php
$x = 5;
echo "Should be 5: " . $x– . "<br />"; //4
echo "Should be 6: " . $x . "<br />"; //4
?>
[/php]
<?php
$x = 5;
echo "Should be 5: " . $x++ . "<br />"; //5
echo "Should be 6: " . $x . "<br />"; //6
?>
[/php] [php]
<?php
$x = 5;
echo "Should be 5: " . ++$x . "<br />"; //6
echo "Should be 6: " . $x . "<br />"; //5
?>
[/php] [php]
<?php
$x = 5;
echo "Should be 5: " . $x– . "<br />"; //5
echo "Should be 6: " . $x . "<br />"; //4
?>
[/php] [php]
<?php
$x = 5;
echo "Should be 5: " . $x– . "<br />"; //4
echo "Should be 6: " . $x . "<br />"; //4
?>
[/php]
Key Points
- Operators takes values, performs some operations and returns new values.
- Arithmetic,Assignment,Logical,Increment/decrement are some of the PHP operators.