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bccomp — Compares two numbers.


int bccomp(left_operand, right_operand[, scale]);
string left_operand: First number to compare
string right_operand: Second number to compare
int scale (optional): Number of decimal places


0 if the same; 1 or -1 if different


Compares the value of the first number with the value of the second number. The optional decimal-places argument specifies the number of decimal places to compare. For example, if the number of decimal places is 2, bccomp() would compare to only two decimal places, regardless of how the numbers diverged beyond this level. The function returns 0 if the numbers are the same, 1 if the first number is greater than the second, or -1 if the second number is greater than the first.


Existing since version 3.0


Example 8. Compare two large numbers

echo bccomp($num1,$num2,2) . "\n";
echo bccomp($num1,$num2,4);


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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