(PHP 4 >= 4.1.0, PHP 5, PHP 7)
log1p — ���� log(1 + number)�������� number ��ֵ�ӽ���Ҳ�ܼ����ȷ���
$number
) : float
log1p() ���� log(1 + number)��������
number ��ֵ�ӽ���Ҳ�ܼ����ȷ�����
log() might only return log(1) in this case
due to lack of precision.
numberҪ����IJ���
log(1 + number)
| �汾 | ˵�� |
|---|---|
| 5.3.0 | �˺���������ƽ̨�Ͼ����� |