What is PhpDig?
PhpDig is a PHP MySQL based
Web Spider & Search Engine.



log10 — Calculates the base 10 logarithm of a number.


float log10(num);
float num: Number from which to derive the base 10 logarithm


Base 10 logarithm of a number


log10() returns the base 10 logarithm of the number given by num .


PHP 3, PHP 4

See also

See also exp() , log()


Example 678. Calculate the base 10 logarithm

echo "The base 10 logarithm of 10 is ", log10(10);

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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