posix_geteuid

(PHP 4, PHP 5, PHP 7, PHP 8)

posix_geteuid — Return the effective user ID of the current process

Опис

posix_geteuid(): int

Return the numeric effective user ID of the current process. See also posix_getpwuid() for information on how to convert this into a useable username.

Параметри

У цієї функції немає параметрів.

Значення, що повертаються

Returns the user id, as an int

Приклади

Приклад #1 posix_geteuid() example

This example will show the current user id then set the effective user id to a separate id using posix_seteuid(), then show the difference between the real id and the effective id.

<?php
echo posix_getuid()."\n"; //10001
echo posix_geteuid()."\n"; //10001
posix_seteuid(10000);
echo posix_getuid()."\n"; //10001
echo posix_geteuid()."\n"; //10000
?>

Прогляньте також

posix_getpwuid() - Return info about a user by user id
posix_getuid() - Return the real user ID of the current process
posix_setuid() - Set the UID of the current process
POSIX man page GETEUID(2)

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User Contributed Notes 2 notes

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divinity76+spam at gmail dot com ¶

4 years ago

if you for some reason need the euid without depending on php-posix being available, try

<?php
function geteuid_without_posix_dependency(): int
{
    try {
        // this is faster if available
        return \posix_geteuid();
    } catch (\Throwable $ex) {
        // php-posix not available.. fallback to hack
        $t = tmpfile();
        $ret = fstat($t)["uid"];
        fclose($t);
        return $ret;
    }
}

down

Anonymous ¶

1 year ago

Please note the example code shown above is invalid and will fail, since UID 10001 cannot use posix_seteuid to change its UID to 10000

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