note 104737 modified in function.posix-getpwuid by danbrown

Here's a fairly safe way to get the username from uid even if the posix extension isn't installed. <?php function GetUsernameFromUid($uid) { if (function_exists('posix_getpwuid')) { $a = posix_getpwuid($uid); return $a['name']; } # This works on BSD but not with GNU elseif (strstr(php_uname('s'), 'BSD')) { exec('id -u ' . (int) $uid, $o, $r); if ($r == 0) return trim($o['0']); else return $uid; } elseif (is_readable('/etc/passwd')) { exec(sprintf('grep :%s: /etc/passwd | cut -d: -f1', (int) $uid), $o, $r); if ($r == 0) return trim($o['0']); else return $uid; } else return $uid; } ?> --was-- Here's a fairly safe way to get the username from uid even if the posix extension isn't installed. function GetUsernameFromUid($uid) { if (function_exists('posix_getpwuid')) { $a = posix_getpwuid($uid); return $a['name']; } # This works on BSD but not with GNU elseif (strstr(php_uname('s'), 'BSD')) { exec('id -u ' . (int) $uid, $o, $r); if ($r == 0) return trim($o['0']); else return $uid; } elseif (is_readable('/etc/passwd')) { exec(sprintf('grep :%s: /etc/passwd | cut -d: -f1', (int) $uid), $o, $r); if ($r == 0) return trim($o['0']); else return $uid; } else return $uid; } http://php.net/manual/en/function.posix-getpwuid.php