PHP Math functions for addition, subtraction, multiplication & division

Basic arithmetic operators in PHP

PHP uses +, -, * and / for the four basic arithmetic operations. Keep numeric input validated before using it in calculations.

$a = 12;
$b = 5;

echo $a + $b; // 17
echo $a - $b; // 7
echo $a * $b; // 60
echo $a / $b; // 2.4

This is the recommended starting pattern. The detailed examples below are retained and modernized for additional variations and explanation.