On Fri, 28 Aug 2009 17:22:20 -0600, LinuxManMikeC wrote:
> <a href="<?php echo $url; ?>">click here</a>
*Groan*
Throw any random web site to an HTML validator
and you're likely to see this kind of slop all
over.
The correct solution is of course:
$u = htmlspecialchars ($url);
echo "<a href=\"$u\">$u</a>";
[A more elaborate way to flay this feline is
included below.]
/Nisse
/* Reworked from slightly different code.
Bugs may have been introduced. */
<?php
function url_to_links ($url)
{
if (preg_match ('@^([a-z]+://)(.*)@i', $url, $m)) {
$prfx = $m[1];
$path = $m[2];
} else {
return htmlspecialchars ($url);
}
$url_sofar = $prfx;
$links = htmlspecialchars ($prfx);
$segs = explode ('?', $path, 2);
if (isset ($segs[1]))
$query = $segs[1];
$segs = explode ('/', $segs[0]);
for ($segn = 0; $segn < count ($segs); $segn++) {
$url_sofar .= $segs[$segn];
if (isset ($segs[$segn+1]))
$url_sofar .= '/';
if ($segs[$segn] !== '') {
$links .= '<a href="' . htmlspecialchars ($url_sofar) . '">'
. htmlspecialchars ($segs[$segn]) . '</a>';
}
if (isset ($segs[$segn+1]))
$links .= '/';
}
if (isset ($query)) {
$url_sofar .= "?$query";
$links .= '?<a href="' . htmlspecialchars ($url_sofar)
. '">' . htmlspecialchars ($query) . '</a>';
}
return $links;
}
$u = 'https://ebagwa.example/abd/def/ghi?s=t&u=v&w=x&y=z';
$u_h = htmlspecialchars ($u);
$links = url_to_links ($u);
header ('Content-Type: text/html');
echo <<<_
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd";>
<title>url_to_links()</title>
<pre>
$u_h
↓
$links
</pre>
_;
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