$n = 1.25;
$whole = floor($n); // 1
$fraction = $n - $whole; // .25
然后与1/4、1/2、3/4等进行比较.
如果是负数，请使用以下选项:
function NumberBreakdown($number, $returnUnsigned = false)
{
$negative = 1;
if ($number < 0)
{
$negative = -1;
$number *= -1;
}
if ($returnUnsigned){
return array(
floor($number),
($number - floor($number))
);
}
return array(
floor($number) * $negative,
($number - floor($number)) * $negative
);
}
$returnUnsigned阻止它进入-1.25到-1&-0.25.