The calculation is main part of any programming language. in PHP you can add, subtract , multiply and perform division of number. You can use the basic arithmetic operator + , - , * and / for calculation.
To add the contents of variables, you just separate each variable name with a plus symbol.
for example
<?php $first_number=100; $second_number=5; echo $first_number + $second_number ; ?>
You can also calculate the direct values:
echo 10 + 20 + 30 ;
Or even this:
$number = 10;
echo $number + 30 ;
in this example we use * operator which is used for multiplication.
<?php $first_number = 10; $second_number = 20; $third_number = 100; $total = $third_number * $second_number * $first_number; echo $total ; ?>
Variables in PHP
PHP Concatenation
Calculation in PHP
If Statements in PHP
if ... else Statements in PHP
Nested IF Structure in PHP
PHP Comparison Operators
Switch Statement in PHP
Logical Operators In PHP
PHP Booleans
FOR Loop in PHP
While Loop In PHP
foreach Loop In PHP
Break Statement
Array In PHP
Associative Array
The Count function
Changing Case Function
Trim Function In PHP
Str_shuffle( ) function
strpos function in PHP
Explode() Function in PHP
Function
Passing Function Arguments
Server Variables
Header Function
Include Function
The require Function