(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
hypot — Calculate the length of the hypotenuse of a right-angle triangle
$x, float $y): float
hypot() returns the length of the hypotenuse of a
right-angle triangle with sides of length x and
y, or the distance of the point
(x, y) from the origin.
This is equivalent to sqrt(x*x + y*y).
xLength of first side
yLength of second side
Calculated length of the hypotenuse