Working out the image path...partly solved, please have a look at my code

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Hi,
I wrote this to the list a little while back and have
been working on it...i have come 95% of the way but
for some reason cant work the other 5% out...can
somebody help please?

Basically I need to figure out the URL or a image from
a relitive path...something like this:


/blah.jpg // should return http://x.com/blah.jpg

/imgs/blah.jpg // return http://x.com/imgs/ blah.jpg

imgs/blah.jpg //return
http://x.com/t1/t2/t3/imgs/blah.jpg

../imgs/blah.jpg // etc

/../imgs/blah.jpg //etc

http://some-site-blah.com/imgs/blah.jpg // return the
same url



running the below code will show you how far i have
come and how only 2 examples are not working for some
damn reason.


********************* code start **************

<?php

$url='http://www.textx.com/t1/t2/t3/blah.html';

function ret_url($rel_path, $base = '')
{
 $base_path = substr($base, 0, strpos($base, '/',7));

if(substr($rel_path,0,1)=='/' &&
!strpos($rel_path,'/../'))
 {  return $base_path.$rel_path; }

	 elseif(strpos($rel_path,'://') > 0)
		 {  return $rel_path; }

		 else {  return
collapse(dirname($base).'/'.$rel_path); }

 return $rel_path;
}

/* this function removes the /../ parts */
function collapse($path)
{
 
 while(strpos($path,'/../') !== false)
 {$p2 = ereg_replace('/([^/]*)/\.\./','/',$path);
  if($p2==$path)
   break;
  $path = $p2;
 }
 
 return $path;
}

$uris = array();
$uris[] = '/blah.jpg';
$uris[] ='/imgs/blah.jpg';
$uris[] ='imgs/blah.jpg';
$uris[] ='../imgs/blah.jpg';
$uris[] ='/../imgs/blah.jpg';  // ## not working ##
$uris[] ='/../../imgs/blah.jpg'; // ## not working ##
$uris[] ='http://some-site-blah.com/imgs/blah.jpg';

echo '<table border=1>';
foreach($uris as $uri)
{
echo '<tr><td>'.htmlspecialchars($uri).'</
td><td>'.htmlspecialchars(ret_url($uri,$url)).'</td></tr>';
}
echo '</table>';
?>

******************* code end ***************

Thanks,
Mag

=====
------
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- Creativity is great, but plagiarism is faster!
- Smile, everyone loves a moron. :-)


		
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