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PHP fmod() Function
Definition and Usage
The name fmod stands for floating modulo . This function returns remainder of division of two floating point numbers. If x/y results in i as division and r as remainder so that
x = y*i+r
In this case, fmod(x,y) returns r
Syntax
fmod ( float $x , float $y ) : float
Parameters
| Sr.No | Parameter & Description |
|---|---|
| 1 | x This parameter forms numerator part of division expression |
| 2 | y This parameter forms denominator part of division expression |
Return Values
PHP fmod() function returns floating point remainder of the act of division of x by y. Remainder carries sign of x.
PHP Version
This function is available in PHP versions 4.x, PHP 5.x as well as PHP 7.x.
Example
Following example calculates remaainder of division of 5.25 with 1.5 and returns 0.75
<?php
$x=5.25;
$y=1.5;
$r=fmod($x, $y);
echo "fmod(" . $x . "," . $y . ") = " . $r;
?>Output
This will produce following result −
fmod(5.25,1.5) = 0.75
Example
Following example has a negative numerator. Hence, remainder is also negative.−
<?php
$x=-10;
$y=3;
$r=fmod($x, $y);
echo "fmod(" . $x . "," . $y . ") = " . $r;
?>Output
This will produce following result −
fmod(-10,3) = -1
Example
Both parameters (-10 and -3) in following example are negative. As the remainder carries sign of numerator, result is -1−
<?php
$x=-10;
$y=-3;
$r=fmod($x, $y);
echo "fmod(" . $x . "," . $y . ") = " . $r;
?>Output
This will produce following result −
fmod(-10,-3) = -1
Example
If numerator is 0, denominator is non-zero, remainder is 0. If denominator is 0, remainder is NAN −
<?php
$x=0;
$y=3.33;
$r=fmod($x, $y);
echo "fmod(" . $x . "," . $y . ") = " . $r . "
";
$r=fmod($y, $x);
echo "fmod(" . $y . "," . $x . ") = " . $r;
?>Output
This will produce following result −
fmod(0,3.33) = 0 fmod(3.33,0) = NAN
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