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<expm1floor>
^Math FunctionsLast updated: Mon, 26 Oct 2026

fdiv

(PHP 8)

fdiv — Divides two numbers, according to IEEE 754

Description

function fdiv(float $num1, float $num2): float

Returns the floating point result of dividing the num1 by the num2. If the num2 is zero, then one of INF, -INF, or NAN will be returned.

Note that in comparisons, NAN will never be equal (==) or identical (===) to any value, including itself.

Parameters

num1

The dividend (numerator)

num2

The divisor

Return Values

The floating point result of num1/num2

Examples

Example #1 Using fdiv()

<?php
var_dump(fdiv(5.7, 1.3)); // float(4.384615384615385)
var_dump(fdiv(4, 2)); // float(2)
var_dump(fdiv(1.0, 0.0)); // float(INF)
var_dump(fdiv(-1.0, 0.0)); // float(-INF)
var_dump(fdiv(0.0, 0.0)); // float(NAN)
?>

See Also

  • Division operator /
  • intdiv() - Integer division - Integer division
  • fmod() - Returns the floating point remainder (modulo) of the division of the arguments
  • fpow() - Raise one number to the power of another, according to IEEE 754


<expm1floor>
^Math FunctionsLast updated: Mon, 26 Oct 2026