On Thu, May 06, 2004 at 12:47:10PM -0400, Paul Chvostek wrote:
> On Thu, May 06, 2004 at 11:26:34AM -0400, Rob Ellis wrote:
> > >
> > > $text = ereg_replace("<!--[^>]*-->","",$text);
> >
> > you can make the .* less greedy...
> >
> > $text = preg_replace('/<!--.*?-->/', '', $text);
>
> Interesting to know. My preg-foo is limited; I came at PHP from a
> background of awk and sed, so when I regexp, I'm a little more
> traditional about it.
>
> Interestingly, from a shell:
>
> $ text='one <!-- bleh --> two\nthree <!-- blarg -->four\n'
> $ printf "$text" | sed -E 's/<!--([^-][^-]?[^>]?)*-->//g'
> one two
> three four
>
> which is the same behaviour as PHP. But that still doesn't cover
> multi-line. PHP's ereg support is supposed to, but doesn't work with
> this particular substitution:
>
> $text="one <!--bleh\nblarg -> two\n";
> print ereg_replace("<!--([^-][^-]?[^>]?)*-->", "",$text);
>
> returns
>
> one <!--bleh
> blarg -> two
>
> But we know it really does support multiline, because:
>
> $text="aaaabb\nbbcccc";
> print ereg_replace("[^ac]","",$text);
>
> returns
>
> aaaacccc
>
> So ... this is interesting, and perhaps I'll investigate it further if
> the spirit moves me. ;-)
right, to strip multi-line comments with preg_replace you need /s
$text = preg_replace('/<!--.*?-->/s', '', $text);
- rob
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