(PHP 4, PHP 5, PHP 7)
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$arg
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] ) : float
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arg要锟斤拷锟斤拷锟斤拷锟斤拷锟街�
baseThe optional logarithmic base to use (defaults to 'e' and so to the natural logarithm).
锟斤拷锟斤拷 logbase
arg锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 4.3.0 |
锟斤拷选锟斤拷锟斤拷 base锟斤拷锟矫★拷
锟斤拷锟斤拷约锟斤拷锟斤拷锟斤拷锟斤拷锟� b 为锟斤拷 n
锟侥讹拷锟斤拷锟斤拷锟斤拷锟斤拷实使锟矫碉拷锟斤拷锟斤拷学锟斤拷式锟斤拷logb(n) =
log(n)/log(b)锟斤拷锟斤拷锟斤拷 log 锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷
|