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getrandmax — Returns the maximum random number possible, as defined by the system's RAND_MAX value.


int getrandmax(void)


Maximum random value


getrandmax() returns the maximum value that rand() can produce. This function is basically a utility function, but can have application when manipulating numbers produced by rand() .

This function cannot fail.


PHP 3, PHP 4

See also

See also mt_getrandmax() , mt_rand() , mt_srand() , rand() , srand()


Example 675. Get the maximum value returnable by rand()

echo "Max value of rand() is: ", getrandmax();

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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