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(PHP 4 >= 4.2.0, PHP 5)

fmod -- Returns the floating point remainder (modulo) of the division of the arguments

Description

float fmod ( float x, float y )

Returns the floating point remainder of dividing the dividend ( x ) by the divisor ( y ). The reminder ( r ) is defined as: x = i * y + r, for some integer i . If y is non-zero, r has the same sign as x and a magnitude less than the magnitude of y .

Example 1. Using fmod()

<?php
$x = 5.7;
$y = 1.3;
$r = fmod($x, $y);
// $r equals 0.5, because 4 * 1.3 + 0.5 = 5.7
?>