PHP hypot() Function – Calculate the Length of the Hypotenuse

hypot() calculates the length of the hypotenuse of a right‑angled triangle based on the lengths of the two legs $x and $y, equivalent to sqrt($x*$x + $y*$y).

Parameters $x – length of the first side. $y – length of the second side.

Return value

Returns the computed hypotenuse length as a float.

Example

<?php
echo hypot(3,4);
echo "<br>";
echo hypot(4,6);
echo "<br>";
echo hypot(1,3);
echo "<br>";
echo sqrt(3*3+4*4);
?>

Output

5
7.211102550928
3.1622776601684
5