Smarty

[Subudhinath]

There seems to be tons of posts with people wondering about things related to the problem surrounding relative linking (of images, css, js and other webpages) in the template files. There were many 'kind of' solutions but no really good ones.

As I see it the only solution to this problem would be that Smarty automatically would convert all relative links to absolute ones during compilation. For this it would need to know where the web root is though, I guess this could be fixed by something like a $smarty->root_dir = "/path/to/web/root/directory/"; in the php-script using Smarty.

[Subudhinath]

Here's a piece of useful code that I found at:
http://www.webmasterworld.com/forum88/334.htm

I guess that one could make a plug-in out of this. I think I'll try if nobody else is interested, but I'm really new to PHP so it'd be a good exercise but wouldn't maybe make a perfect result.

[php:1:7990d8ad43]<?php
function make_abs($rel_uri, $base, $REMOVE_LEADING_DOTS = true) {
preg_match("'^([^:]+://[^/]+)/'", $base, $m);
$base_start = $m[1];
if (preg_match("'^/'", $rel_uri)) {
return $base_start . $rel_uri;
}
$base = preg_replace("{[^/]+$}", '', $base);
$base .= $rel_uri;
$base = preg_replace("{^[^:]+://[^/]+}", '', $base);
$base_array = explode('/', $base);
if (count($base_array) and!strlen($base_array[0]))
array_shift($base_array);
$i = 1;
while ($i < count($base_array)) {
if ($base_array[$i - 1] == ".") {
array_splice($base_array, $i - 1, 1);
if ($i > 1) $i--;
} elseif ($base_array[$i] == ".." and $base_array[$i - 1]!= "..") {
array_splice($base_array, $i - 1, 2);
if ($i > 1) {
$i--;
if ($i == count($base_array)) array_push($base_array, "");
}
} else {
$i++;
}
}
if (count($base_array) and $base_array[-1] == ".")
$base_array[-1] = "";
/* How do we treat the case where there are still some leading ../
segments left? According to RFC2396 we are free to handle that
any way we want. The default is to remove them.
#
"If the resulting buffer string still begins with one or more
complete path segments of "..", then the reference is considered
to be in error. Implementations may handle this error by
retaining these components in the resolved path (i.e., treating
them as part of the final URI), by removing them from the
resolved path (i.e., discarding relative levels above the root),
or by avoiding traversal of the reference."
#
http://www.faqs.org/rfcs/rfc2396.html 5.2.6.g
*/
if ($REMOVE_LEADING_DOTS) {
while (count($base_array) and preg_match("/^\.\.?$/", $base_array[0])) {
array_shift($base_array);
}
}
return($base_start . '/' . implode("/", $base_array));
}
?>[/php:1:7990d8ad43]

[mohrt]

Could you give an explicit example of what you're accomplishing?

[Subudhinath]

[mohrt]

[Subudhinath]

Oh... that's not what I meanth...

I'll give an example.

the file /templates/something/some.tpl contains:
<img src="../../images/some.jpg">

It is then used by /index.php which won't be able to locate the picture.


If there would be a postfilter (or something) changing relative links to absolute (such as <img src="/images/some.jpg"> we wouldn't have this problem.

The function make_abs needs to know the absolute URI of the tpl-file and the relative URI to make it absolute.

Sorry, I should have given you this example earlier...

[Subudhinath]

At last... My first published php-script ever. Enjoy!
I've used ereg even though preg probably would be better (if I knew how to use it). You're welcome to comment on it and/or improve it.

I think I'm going to make a postfilter from this and the make_abs-function which I posted earlier.


[php:1:bfe8ec49ff]<?php
require_once("make_abs.php");

//$content is meanth for html-code such as a Smarty-template
//$base is the location of the template (relative to the web-root)

function bulk_make_abs($content, $base) {
while (eregi("(href|src)=\"(([^/])[[:alnum:]/+=%&_.~?-]*)\"", $content, $regs)) {
$input_uri = $regs[2];
$output_uri = make_abs($input_uri, $base);
$content = ereg_replace("((href|src)=\")$input_uri(\")", "\\1$output_uri\\3", $content);
}
return($content);
}


//Here follows some code to demonstrate the functionality

$page='
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Test page</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>

<body>
<p><a href="../templates/fi_bill.tpl">fi_bill</a>
</p>
<p><a href="testdir/test.html">another test.html</a> </p>
<p><a href="index.php">Benny\'s index.php</a> </p>
<p><a href="../index.php">Parent index.php</a> </p>
<p><a href="../">Parent dir</a> </p>
</body>
</html>';

echo bulk_make_abs($page, "/benny/test.html");

?>[/php:1:bfe8ec49ff]

[kills]

why do you dont use the realpath function?

[Subudhinath]

[messju]

[Subudhinath]

[Subudhinath]

I posted the postfilter version of the function bulk_make_abs under plug-ins since this thread seems to have gone a bit off topic here:

http://www.phpinsider.com/smarty-forum/viewtopic.php?p=12467