array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'function.posix-setgid.php', 1 => 'posix_setgid', ), 'up' => array ( 0 => 'ref.posix.php', 1 => 'POSIX 函数', ), 'prev' => array ( 0 => 'function.posix-seteuid.php', 1 => 'posix_seteuid', ), 'next' => array ( 0 => 'function.posix-setpgid.php', 1 => 'posix_setpgid', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/posix/functions/posix-setgid.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 4, PHP 5, PHP 7, PHP 8)
posix_setgid — Set the GID of the current process
Set the real group ID of the current process. This is a privileged function and needs appropriate privileges (usually root) on the system to be able to perform this function. The appropriate order of function calls is posix_setgid() first, posix_setuid() last.
注意:
If the caller is a super user, this will also set the effective group id.
group_id
The group id.
示例 #1 posix_setgid() example
This example will print out the effective group id, once it is changed.
<?php
echo 'My real group id is '.posix_getgid(); //20
posix_setgid(40);
echo 'My real group id is '.posix_getgid(); //40
echo 'My effective group id is '.posix_getegid(); //40
?>