php fenced code doesn't matching ending fence

[drKnoxy]

if you have a <?php at the beginning of the fenced block it won't match the closing fence

```php
<?php
function test()
{
    return 'something';
}
``` \\closing the php fence, delete this comment

# and then add a header down here will won't get styled properly

If you can point me at the right area to fix this i'd be glad to help, but I think it might be something more to the core of subl.