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PHP Preg Match All

jwzk
jwzk asked
on
Medium Priority
561 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>

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Top Expert 2008

Commented:
You need the 's' pattern modifer to match newlines:

preg_match_all("/id=\"firstUL(.+)\<\/div>/s", $file, $match1);
Top Expert 2008
Commented:
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Author

Commented:
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);
Top Expert 2008

Commented:
Use the 'U' (ungreedy) pattern modifier:

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

Author

Commented:
Perfect + the U modifier, thanks!
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