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PhpDig is a PHP MySQL based
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posix_setgid — Sets the group ID for the calling process (POSIX.1, 4.2.2)


bool posix_setgid(gid);
int gid: Requested group ID


TRUE on success and FALSE on failure.


This function attempts to set the group ID for the current process to that given in gid . Under Linux, a non-root process may elect to relinquish its priviledged group ID, perform some unpriviledged task, and securely resume its original group ID. Root processes must be more careful, as once they have given up their priviledged group ID it will be impossible to regain.


PHP 3.0.13+, PHP 4.0b4+


Example 1086. Setting the real group ID for a process

if (!posix_setgid(503)) {
    echo "Could not set new group ID.\n";
} else {
    echo "Group ID successfully changed.\n";

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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