hypot()
hypot() — Calculate the length of the hypotenuse of a right-angle triangle.
Built-in function of PHP 8.5. The manual lists it as available in PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
What it does
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).
Signature
hypot(float $x, float $y): float
Parameters
| Parameter | Type | What it takes |
|---|---|---|
| $x | float | Length of first side |
| $y | float | Length of second side |
Return value
Calculated length of the hypotenuse
Example
The PHP manual ships no example for hypot(); the signature and the parameter table above are the contract.
All PHP 8.5 built-in functions
Reference card built from the PHP manual page hypot() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.