Fil d'ariane ou breadcrumbs

<?php
$titre="nomdulien.php";
$nbr = 4;
$name = substr($titre, 0, -$nbr);
$var=explode('/',$_SERVER['REQUEST_URI']);
$i=0;
$i2=0;
foreach($var AS $contenu)
{
if($var[$i]!=$var[count($var)-1] and !empty($var[$i]) AND $i!=0)
{
$contenu2.=((!empty($contenu))?($contenu.'/'):(''));
$var[$i]='<a href="http://'.$_SERVER['HTTP_HOST'].'/'.$contenu2.'">'.ucfirst($contenu).'</a>';
$i2++;
}
$i++;
}
if (empty($_GET['p']))
$var[$i-1]=$titre;
else
$var[$i-1]=$_GET['p'].'.php';
if(!empty($var[count($var)-1]))
{
$var[count($var)-1]=ucfirst(substr($var[count($var)-1],0,strrpos($var[count($var)-1],'.')));
$i2++;
}
$var=ltrim(urldecode(implode(' > ',$var)),' > ');
if(preg_match('# > $#isU',$var))
{
$var=preg_replace('# > $#isU','',$var);
}
?> 

<?php echo ' <a href="http://'.$_SERVER['HTTP_HOST'].'">Accueil</a> > '.$var; ?>