Regex, get text from within two tags.

[dlate]

Hi,

 

(this is a PCRE related issue)

 

This has probably been asked already, but i did a search and couldnt find my anwser, so here goes:

 

Im trying to preg_match and then preg_replace between two tags.

 

The html would look like this:

 

<dmod::user|overview>
<drow>asdasdasd</drow>
</dmod>

 

For the preg_match i tried this but it failed and im pretty clueless on how to get it to work:

 

if(preg_match('/(<dmod:(.+?)(>)(.+?)(</dmod>)/iU', $str)) {
    echo 'match?';
}

 

If u guys got any tips on how to fix this, or point me in the right direction id really appreciate it.

 

Thanks,

Dlate

[dlate]

update:

 

This should be the right pattern but its still not working... going crazy...

 

/<dmod([^>].*[^/])>/im

[dlate]

Update 2:

 

I solved it!

problem was i wasnt escaping the pattern proper so my modifiers would get messed up.

correct pattern was :

 

if(preg_match('/(<dmod:(.+?)(>)(.+?)(<\/dmod>)/iU', $str)) {
    echo 'match?';
}

 

Hopes this might help other people with similiar problems

[dlate]

Ok apprently this doesnt work over several lines and im completly clueless again  ???

[dlate]

Solved it!

 

I missed the /s for spaces, i really hope someone in the future can get help from this topic tho, took me a while to figure it out.

 

final code:

 

$pattern = '/<dmod:.+?)>(.+?)<\/dmod>/is';
if(preg_match($pattern, trim($output), $matches)) {
   $output = preg_replace($pattern, $matches[2], $output);
}

[effigy]

- By changing the delimiter, there's no need to escape /.

- Greediness is generally more efficient than laziness; use [^>]+.

- Why run a match and a replace?

 

<pre>
<?php
$output = <<<DATA
	<dmod::user|overview>
		<drow>asdasdasd</drow>
	</dmod>
DATA;
echo htmlspecialchars($output), '<hr>';
$pattern = '%<dmod:[^>]+)>(.+?)</dmod>%is';
$output = preg_replace($pattern, '$2', $output);
echo htmlspecialchars($output);
?> 
</pre>

[dlate]

Hehe nice, didnt know u could change the delimiter

As far as me using preg_match as well as replace is because i want to save the data between the tags and then replace it.

 

Thanks for ur input, i really appreciate any help i can get with regex as im a complete newbie with it,

could you please explain why ur putting <<<DATA in ur string?

[effigy]

preg_match only matches, but preg_replace matches and replaces (what it matches).

 

Essentially, what you have is...

  if (my string matches the pattern) {

    run the replace against the pattern

  }

...which is pointless because you cannot replace what you cannot match--all you need is the "run the replace against the pattern" step.

 

<<< is heredoc syntax.

 

 

[dlate]

Ah i see, thank you very much u have been very helpfull.

When im done with this script ill probably have to run trough it a couple of times to make sure i remove any redundant code