(PHP 4, PHP 5, PHP 7, PHP 8)
posix_geteuid — Return the effective user ID of the current process
Return the numeric effective user ID of the current process. See also posix_getpwuid() for information on how to convert this into a usable username.
This function has no parameters.
Returns the user id, as an int
Example #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
?>
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;
}
}