log
log
(PHP 4, PHP 5, PHP 7)
log — Natural logarithm
Description
float log ( float $arg [, float $base = M_E ] )
If the optional base parameter is specified, log() returns logbase arg, otherwise log() returns the natural logarithm of arg.
Parameters
-
arg -
The value to calculate the logarithm for
-
base -
The optional logarithmic base to use (defaults to 'e' and so to the natural logarithm).
Return Values
The logarithm of arg to base, if given, or the natural logarithm.
See Also
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.log.php
