Php basics

<?php
$output = null;
 
$num1 = 10;
$num2 = 20;
 
// Basic math
$output = "$num1 + $num2 = " . $num1 + $num2;
$output = "$num1 - $num2 = " . $num1 - $num2;
$output = "$num1 * $num2 = " . $num1 * $num2;
$output = "$num1 / $num2 = " . $num1 / $num2;
$output = "$num1 % $num2 = " . $num1 % $num2;
 
// Assignment operators
$num3 = 10;
 
$num3 += 10;
$num3 -= 10;
$num3 *= 2;
$num3 /= 2;
$num3 %= 2;
 
$output = $num3;

// Built in php function
 
// random numbers
$output = rand();
$output = getrandmax();
$output = rand(1, 10); // both 1 & 10 included
 
// round
$output = round(3.14);
$output = round(3.14, 1);
 
// ceil
$output = ceil(3.14); // outputs 4
 
// floor
$output = floor(3.14); // outputs 3
 
// square root
$output = sqrt(2024);

// pi
$output = pi();
 
// absolute
$output = abs(-20);
 
// max
$output = max(1, 2, 3, 4, 5); // outputs 5
$output = max([1, 10, 20, 50, 30]); // works on array too
 
// min
$output = min(1, 2, 3, 4, 5); // outputs 5
$output = min([1, 10, 20, 50, 30]); // works on array too
 
// number formatter
$output = number_format(1000.120031, 2); // outputs 1,000.12
?>