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PhpDig is a PHP MySQL based
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bcsqrt — Calculates square root.


string bcsqrt(left_operand[, scale]);
string left_operand: Number to calculate from
int scale (optional): Number of decimal places to return


Square root of left operand


bcsqrt() calculates the square root of a given number and returns the result, formatted with a specified number of decimal places (optional).


Existing since version 3.0


Example 14. Calculate the square root of a large number

$num1 = "9912343.21";
echo bcsqrt($num1, 3);


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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