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Thingmand

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Get <div> with preg_replace

I have a function to extract all <div> from a html code. It gives med the div's id and content, so it can be treated in a function.

It is working very, but the problem is that I now have to get div's inside a div extracted also!

Ex.

<div id="foo">
This is just fill <div id="foo2">This is a new block</div> This is more fill
</div>

How can I do that? I don't necessarily need the parent div, just the ones inside (not containing any child div's)  
// Function to extract div's from HTML code
 
$pattern = '/(<div.*?id="([a-z09_]+)".*?>)(.*?)<\/div>/ise';
		
$replacements = get_div_content("$1", "$2", "$3");
		
$proccesed_html = preg_replace($pattern, $replacement, $html);

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Roonaan
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I think you get a hard time getting this done using preg_replace.

You could try using arrays:
      $parts = explode('</div>', $html);
      foreach($parts as $i => $p) {
            $div_start = strrpos($p, '<div');
            if($div_start === false) {
                  continue;
            }
            $div = substr($p, $div_start).'</div>';
            
                       .. do something with the div html ...
      }
Sending $proccesed_html[0] back through the same algorithm should isolate the inner <div>.  Basically,make this a function with the possibility of recursion.

For example, say I have this HTML:

This is not in a div<div>div Stuff<div>more div stuff</div>last stuff</div>Out of div again

The first preg should match the entire first div (assuming you're using 'greedy' mode).  Submitting the contents of that div (your '(.*?)' marker) back in should isolate the second div.

BTW, (.*?) is a little redundant, yes?  Any character (.) repeated 0 or more times (*), repeated 0 or 1 times (?).  
Roonaan's comment addresses the point I left out: use preg_match() or preg_match_all() instead.  If you need to replace text, it might be easier to accomplish once you've already isolated the inner divs (working from the inside out)
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Thingmand

ASKER

Roonaan: Thanks for the idea

routinet: It was on my mind, that I needed to re-run the results, but I thought maybe there was a trick with regs. I don't quite follow the use of preg_match instead? Could you give a simple example?
On further reflection, I have to agree with Roonaan.  I don't know of a way to express the potential for nesting.  Searching the string manually sounds like what you need.
Well, the strange thing is that its working partly! The attach test code find these class id's:

ID: header
ID: menu
ID: page
ID: newsletter
ID: news
ID: content
ID: footer

I can't see the system!
<?php
 
	$html = <<<END
<body>
<!-- start header -->
<div id="header">
	<div id="logo"></div>
	<div id="menu"></div>
</div>
<!-- end header -->
<!-- start page -->
<div id="page">
	<!-- start sidebar -->
	<div id="sidebar">
		<div id="box5"></div>
		<!-- start newsletter form -->
		<div id="newsletter"></div>
		<!-- end newsletter form -->
		<!-- start recent news -->
		<div id="news"></div>
		<!-- end recent news -->
	</div>
	<!-- end sidebar -->
	<!-- start content -->
	<div id="content">
		<div id="box6"></div>
	</div>
	<!-- end content -->
	<div style="clear: both; height: 30px;">&nbsp;</div>
</div>
<!-- end page -->
<div id="footer"></div>
</body>
		
END;
 
 
		
	$pattern = '/(<div.*?id="([a-z09_]+)".*?>)(.*?)<\/div>/ise';
	
	$replacement = 'get_div_content("$1", "$2", "$3")';
	
	$proccesed_html = preg_replace($pattern, $replacement, $html);
		
		
	function get_div_content($orgDiv, $classID, $rules) {
 
			echo "ID: $classID<br>\n";
	}
	
	echo "<br>Pattern: <pre>" . htmlentities($pattern) . "</pre><br>\n";
	
	echo "<pre>" . htmlentities($html) . "</pre><br><br>\n";
?>

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Roonaan
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// $pattern = '/(<div.*?id="([a-z09_]+)".*?>)(.*?)<\/div>/ise';
 
// Should be:
 
$pattern = '/(<div.*?id="([a-z0-9_]+)".*?>)(.*?)<\/div>/ise';
 
// It dosn't change the result, though...

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Good damn, thats a brilliant idea! It works like a charm with xml_parser :o)