Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

PHP Preg Match All

Posted on 2009-07-05
5
Medium Priority
?
535 Views
Last Modified: 2012-05-07
I am trying to match UL's in an HTML file via PHP. I want to match #firstUL and get all of the LI's out of only that ID. Same thing for #secondLI.

preg_match_all("/id=\"firstUL(.+)\<\/div>/", $file, $match1);
preg_match_all("/<li><a href=\"(.*)\">(.*)<\/a><\/li>/", $match1[0][0], $match2);

The outcome I am looking for is:

[0] -> [0] = '/index.php', [1] = 'Example'
[1] -> [0] = '/index.php', [1] = 'Example'
[2] -> [0] = '/index.php', [1] = 'Example'
<div id="firstUL">
	<div class="someclass">
		<ul>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
		</ul>
		<ul>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
		</ul>
	</div>
</div>
<div id="secondUL">
	<div class="someclass">
		<ul>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
		</ul>
		<ul>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
			<li><a href="/index.php">Example</a></li>
		</ul>
	</div>
</div>

Open in new window

0
Comment
Question by:jwzk
  • 3
  • 2
5 Comments
 
LVL 39

Expert Comment

by:Roger Baklund
ID: 24780360
You need the 's' pattern modifer to match newlines:

preg_match_all("/id=\"firstUL(.+)\<\/div>/s", $file, $match1);
0
 
LVL 39

Accepted Solution

by:
Roger Baklund earned 2000 total points
ID: 24780404
For the result array you wanted, try this:
preg_match_all("/id=\"firstUL(.+)\<\/div>/s", $file, $match1);
preg_match_all("/<li><a href=\"(.*)\">(.*)<\/a><\/li>/", $match1[0][0], $match2);
$result = array();
for($i=0;$i<count($match2[1]);$i++)
  $result[]=array($match2[1][$i],$match2[2][$i]);
echo '<pre>';
var_dump($result);
echo '</pre>';

Open in new window

0
 

Author Comment

by:jwzk
ID: 24780416
Perfect, the only problem is the first preg_match_all is still getting both UL's.

This works, but is it the best method? I would prefer to not have to set the second one incase it changes.

preg_match_all("/id=\"firstUL(.+)\id=\"secondUL/s", $fileData, $match1);
0
 
LVL 39

Expert Comment

by:Roger Baklund
ID: 24780626
Use the 'U' (ungreedy) pattern modifier:

preg_match_all("/id=\"firstUL(.+)\<\/div>/sU", $file, $match1);
0
 

Author Closing Comment

by:jwzk
ID: 31599923
Perfect + the U modifier, thanks!
0

Featured Post

Vote for the Most Valuable Expert

It’s time to recognize experts that go above and beyond with helpful solutions and engagement on site. Choose from the top experts in the Hall of Fame or on the right rail of your favorite topic page. Look for the blue “Nominate” button on their profile to vote.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are times when I have encountered the need to decompress a response from a PHP request. This is how it's done, but you must have control of the request and you can set the Accept-Encoding header.
Originally, this post was published on Monitis Blog, you can check it here . In business circles, we sometimes hear that today is the “age of the customer.” And so it is. Thanks to the enormous advances over the past few years in consumer techno…
The viewer will learn how to dynamically set the form action using jQuery.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question