Re: Parsing HTML tags with regex

[gopalr]

in reply to Parsing HTML tags with regex

Hi jithoosin,

Here is the regex to match the tag with attributes value.

m#<([^">]+(?:"[^"]+")*[^>]+)>#

Thanks,
Gopal.R

[jithoosin]

Hi gopal,
THANK YOU VERY MUCH. I won the bet .But now i am in bit of trouble. I donot know how to explain the working to my friends.So could you PLEASE explain the working of the regular expression.Once again THANK YOU VERY MUCH GOPAL.

[gopalr]

m#
<             ## start with <
(             ## group start 
[^">]+        ## text but Not match " and >
(?:"[^"]+")*  ## if " found, match till end quote found. Its optional
[^>]+         ## text but Not match and >
)             ## group end 
>             ## End with >
#

[jithoosin]

Hi gopal,
There is a problem if the input string is my $line = "<select name=\"url><23\" style=\"width><A125px\"  >";
.But i think a slight modification to your previous answer will do the job then #$line =~ m#<([^">]+(?:"[^"]+")*)*[^>]+>#; IS there any problem.Also provide me an asnwer for the question about <!--->---> thing

[Perl Mouse]

But that would match on:

    a < b implies b > a

which does not contain an HTML tag. Oh, and it won't match all HTML tags correctly either. Consider for instance:

    <tag attr1="one" attr2="two">
    <tag attr='"'> <tag attr1='"'>

The first one fails to match because your regex requires that if there are double quoted values inside a tag, they must follow each other. And the second fails because your regex doesn't consider single quoted values.

[Anonymous Monk]

thanks gopal the above regex was usefull