comment on

I did bother... and IMVHO I think it could help out the OP.

Ok, I didn't post *the* solution, but you probably also know there's always more than one way to solve a problem in Perl. This one isn't maybe the easiest, or fastest, or most elegant one... but I still think it could help.

btw: you can always downvote me if you don't like what I said ;)

pussy ass code to proof (I hate proofing) I did bother:

#!/usr/bin/perl

use Text::Balanced qw{extract_multiple extract_bracketed extract_delim
+ited extract_tagged};

my $text = '<p>paragraph<b>BOLD text</p><a href=">>>>">link text</a><d
+iv><p>Some new text <b>in bold and <i>cursive</b></p></div><p>test</p
+>';

local $\ = $/;
print "text= $text";
my @stack;
my $error;

@fields = extract_multiple($text,
                   [
                        { Tag   => sub { extract_tagged($_[0]) } },
                        { Brack => sub { extract_bracketed($_[0],'<>')
+ } },
                   ],
                   undef,
                   0
                   );
foreach my $elem (@fields){
    if(ref( $elem ) eq 'Tag'){
        (print_stack(), $error--) if defined $error;
        print "OK Tag: ".$$elem;
    }
    elsif(ref $elem eq 'Brack'){
        my ($otag) = $$elem =~ m#<([a-zA-Z0-9]+)>#;
        my ($ctag) = $$elem =~ m#</([a-zA-Z0-9]+)>#;
        
        add_to_stack($otag)      if defined $otag;
        remove_from_stack($ctag) if defined $ctag;
    }
    else {
        $error = 1;
    }
}

sub print_stack {
    foreach my $tag (@stack){
        print "not properly closed: ". $tag if defined $tag;
    }
}

sub add_to_stack {
    push @stack, shift;
}

sub remove_from_stack {
    my $tag =  shift;
    foreach my $c (reverse 0 .. @stack) {
        delete $stack[$c]    if($stack[$c] eq $tag ) 
    }
}
[download]

Gives as output:

text= <p>paragraph<b>BOLD text</p><a href=">>>>">link text</a><div><p>
+Some new text <b>in bold and <i>cursive</b></p></div><p>test</p>
not properly closed: b
OK Tag: <a href=">>>>">link text</a>
not properly closed: i
OK Tag: <p>test</p>
[download]

to ask a question is a moment of shame
to remain ignorant is a lifelong shame

In reply to Re^3: Ensuring HTML is "balanced" by insaniac
in thread Ensuring HTML is "balanced" by skx

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


Perl-Sensitive Sunglasses
	PerlMonks