Problem z preg_replace Opcje

[jarekbutek]

[PHP] pobierz, plaintext 
$tekst = preg_replace("#\[youtube\]http://www.youtube.com?watch=(.*?)\[/youtube\]#si", "<object width='480' height='385'><param name='movie' value='http://www.youtube.com/v/\\1'></param><param name='allowFullScreen' value='true'></param><param name='allowscriptaccess' value='always'></param><embed src='http://www.youtube.com/v/\\1' type='application/x-shockwave-flash' allowscriptaccess='always' allowfullscreen='true' width='480' height='385'></embed></object>", $tekst);
[PHP] pobierz, plaintext 

Czemu to nie działa?

[blooregard]

[PHP] pobierz, plaintext 
http://www.youtube.com?watch=
[PHP] pobierz, plaintext 

Tu też masz znaki specjalne, które musisz escape'ować.