What is the fdiv() function in PHP?

The fdiv() function in PHP performs the floating-point division of two numbers and returns its results, according to the IEEE 754 Standard.

Note: The fdiv() function is only available in PHP 8 and newer versions.

Syntax

The prototype of the fdiv() method is shown below:

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

Parameters

The fdiv() function requires two floating numbers as mandatory parameters:

• ＄num1: The dividend of the division to be performed
• ＄num2: The divisor of the division

Return value

The fdiv() function returns the result of the division of the provided parameters, i.e., num1 / num2 as a floating-point value.

If num2 is zero, the fdiv() function returns one of the following:

• INF (Infinite)
• -INF (Negative Infinite)
• NAN (Not-A-Number)

Code

The code below shows how the fdiv() function works in PHP. In this case, we divide two numbers and print the result with the echo function.

Note: The result is also a float.

Expected output

fdiv(14, 6) = 2.3333333333333
fdiv(2, INF) = 0
fdiv(5, 0) = INF