Example: PHP program to calculate the area of an equilateral triangle

C
C++
C#
Java
Python
PHP

<?php
// PHP program to calculate the area of an equilateral triangle

$s = 7;
$a = NULL;

// s = side
// a = area

// Calculate area of equilateral triangle
$a = (sqrt(3) / 4) * ($s * $s);

// Output
echo "Area of the equilateral triangle = " . $a . " sq. units";

?>