Floor

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Returns the largest integer value less than or equal to $value

namespace HH\Lib\Math;

function floor(
  num $value,
): float;

• To find the smallest integer value greater than or equal to $value, see Math\ceil().
• To find the largest integer value less than or equal to a ratio, see Math\int_div().

Parameters

• num $value

Returns

• float

Examples

$floor1 = Math\floor(4.7);
echo "Floor of 4.7 is $floor1 \n";

$floor2 = Math\floor(5);
echo "Floor or 5 is $floor2 \n";