log10

(PHP 4, PHP 5)

log10 — 以 10 为底的对数

float log10 ( float $arg )

返回参数 arg 以 10 为底的对数。

参见 log()。

add a note User Contributed Notes
log10

smalladi at lexgen dot com
21-Nov-2001 07:47


Note that log of a negative or undefined number returns -Infinity.

Last updated: Mon, 26 Nov 2007

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