Kan ikke ændre til include

Hvorfor virker dette ikke:
<? \\Linje 9
$besked = "[include]test2.php[/include]";
$besked = eregi_replace("\[include]([^]]+)\[/include\]", include(\\1), $besked);

echo $besked;

?>

Får denne fejl:
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in C:\localhost\Test\test.php on line 11

Warning: Unexpected character in input: '\' (ASCII=92) state=1 in C:\localhost\Test\test.php on line 11

Warning: Unexpected character in input: '\' (ASCII=92) state=1 in C:\localhost\Test\test.php on line 11

Warning: main(1): failed to open stream: No such file or directory in C:\localhost\Test\test.php on line 11

Warning: main(): Failed opening '1' for inclusion (include_path='.;c:\php4\pear') in C:\localhost\Test\test.php on line 11