\r\n inside <p></p> tags. Removel ?

[design]

Hello folks,
could anybody help me with the following:
<p>lets say we have
a paragraph like this
that is displayed on multiple lines.</p>
All lines are ended with a \r\n
what I want to do is transform this result (but only within the <p> tags!)so everything is displayed in one line. (not in the browser window, but in the source code), eg:
Using the example above this would result in:
<p>lets say we have a paragraph like this that is displayed on multiple lines</p>
I'm not very good with Regexes, so if anybody can help me this,
it would be highly appreciated.
thanks
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[junik]

if you have the <p> area separated out, you can use str_replace quite successfully. if the <p> is located inside a huge block of html and you only want to remove newlines from inside the <p></p> and not outside it, then you're going to have to either separate it out or run a regular expression on the whole mess. You may have to break down and actually learn regex. -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --

[perxy]

thanks for the quick reply. I know in which direction to look for, and I have experience with regexes. Although I haven't found a solution for this particular issue
the p tag is indeed inside a huge block of other markup language, so that's what makes the reges a little h -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --

[browny]

preg_replace_callback
use regex to get whats in the tags, then in the callback use more regex to replace the \r\n's -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --

[quasi]

I agree with browny
and, since you can't nest p tags... you just need to make sure your regex is "ungreedy" by using a U modifier.
I can't remember if < and > are special in regex, so one of the following should work...
Code:
$pattern = '/\<p\>(.+)\<\/p\>/isU';
//or
$pattern = '/<p>(.+)<\/p>/isU'; -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --

[design]

the problem is matching the data between the p tags, the regexes above won't match it, unless its on the same line.

for instance:
Code:
<p>
test
</p>

would not pass the regex, because it contains \r\n's -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --

[ABRAHM]

add the m multiline operator

PHP Code:
$pattern = '/\<p\>(.+)\<\/p\>/misU'; -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --

[lance]

Originally Posted by design

the problem is matching the data between the p tags, the regexes above won't match it, unless its on the same line.

for instance:
Code:
<p>
test
</p>

would not pass the regex, because it contains \r\n's

Actually it will match. try the following example:
PHP Code:
<?php
$txt=<<<FILECONTENTS
<p>
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[emily]

that's right, the m modifier is for the ^ start of text matching and not newline matching. Ignore what i said before. -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --