PHP hypot() Function

The PHP hypot() function returns square root of sum of squares of two arguments, i.e., sqrt(x² +y²). In special cases it returns the following:

If either argument is infinite, then the result is positive infinity.
If either argument is NAN and neither argument is infinite, then the result is NAN.

Syntax

hypot(x, y)

Parameters

`x`	`Required.` Specify a value.
`y`	`Required.` Specify a value.

Return Value

Returns sqrt(x² +y²).

Example:

In the example below, hypot() function returns sqrt(x² +y²).

<?php
echo "hypot(3, 4) = ".hypot(3, 4)."\n";
echo "hypot(5, 12) = ".hypot(5, 12)."\n";
echo "hypot(8, 15) = ".hypot(8, 15)."\n";
echo "hypot(8, -15) = ".hypot(8, -15)."\n";
echo "hypot(-8, -15) = ".hypot(-8, -15)."\n";
echo "hypot(3, INF) = ".hypot(3, INF)."\n";
echo "hypot(3, NAN) = ".hypot(3, NAN)."\n";
?>

The output of the above code will be:

hypot(3, 4) = 5
hypot(5, 12) = 13
hypot(8, 15) = 17
hypot(8, -15) = 17
hypot(-8, -15) = 17
hypot(3, INF) = INF
hypot(3, NAN) = NAN

❮ PHP Math Reference