Re: regexp to replace double with single quotes inside html tags

[John W. Krahn]

Birgit Kellner wrote:
> 
> I would like to replace all double with single quotes inside a html tag,
> i.e. perform the substitution only for html tag attributes, but not outside
> tag boundaries.
> 
> my $string = qq|<a href="http://someurl.url"; title="welrkwlekrj">aha</a>,
> and here "follows" a
> quoted expression: "blabla"<img src="http://someimage.gif"; width="80"
> height="200">|;
> 
> All double quotes should be replaced by single ones except those
> surrounding the string "blabla".
> 
> My approach would be:
> Look for <, followed by a string of characters except >, followed by" - if
> matched, replace this instance of " with '.
> 
> I found the following code to work, but it strikes me as very clumsy and I
> am not sure whether it captures all relevant cases and really excludes all
> those which are not relevant.
> 
> while ($string =~ /(<[^>]*?)"/gs) {
>         my $var = $1;
>         $string =~ s/$var"/$var'/;}
> 
> print qq|$string\n|;


$string =~ s/(<[^>]+>)/$a=$1;$a=~tr|"|'|;$a/eg;


John
-- 
use Perl;
program
fulfillment

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