[RESOLVED] Creating bread crumb using php from the given page url

chinto09

Hi,
i want have created a directory browser using PHP, where user can browse between directories.

Now i want to implement breadcrumb. Like if we are inside say "folder01" then URL of the page is

http://www.xyz.com?file=folder01
and its breadcrumb would be

<ul class="breadcrumb">
<li><a href="index.php">Home</home>
<li><a href="http://www.xyz.com?file=folder01">Folder 01</home>
</ul>

similarly if we are one step deep in "folder01" then page url is
http://www.xyz.com?file=folder01/folder02

and it desired bread crumb would be

<ul class="breadcrumb">
<li><a href="index.php">Home</home>
<li><a href="http://www.xyz.com?file=folder01">Folder 01</home>
<li><a href="http://www.xyz.com?file=folder01/folder02">Folder 02</home>
</ul>

Here is the given code which is working for me.

$root = __DIR__;

function is_in_dir($file, $directory, $recursive = true, $limit = 1000) {
    $directory = realpath($directory);
    $parent = realpath($file);
    $i = 0;
    while ($parent) {
        if ($directory == $parent) return true;
        if ($parent == dirname($parent) || !$recursive) break;
        $parent = dirname($parent);
    }
    return false;
}

$path = null;
if (isset($_GET['file'])) {
    $path = $_GET['file'];
    if (!is_in_dir($_GET['file'], $root)) {
        $path = null;
    } else {
        $path = '/'.$path;
    }
}

if (is_file($root.$path)) {
    readfile($root.$path);
    return;
}

if ($path) echo '<a href="?file='.urlencode(substr(dirname($root.$path), strlen($root) + 1)).'">..</a><br />';
foreach (glob($root.$path.'/*') as $file) {
    $file = realpath($file);
    $link = substr($file, strlen($root) + 1);
    echo '<a href="?file='.urlencode($link).'">'.basename($file).'</a><br />';
}

jgetner

you should have a look at mod rewrite

Ashley_Sheridan

Why not split the input string at the slash character, then use a loop to build up the breadcrumb trail peice by peice. Just use something like a $breadcrumb variable, and use string concatenation to build up each section.

chinto09

@ashely i was also thinking the same...can you come up with some code please 🙂

Ashley_Sheridan

This isn't tested:

<ul class="breadcrumb">
<li><a href="index.php">Home</a></li>

<?php
$breadcrumb = '';
$baseurl = 'http://www.xyz.com?file=';
$file = html_entities($_GET['file']);
$parts = explode('/', $file);

for($i=0; $i<count($parts); $i++)
{
    $breadcrumb .= (($i)?'/':'') . $parts[$i];

echo "<li><a href=\"{$baseurl}$breadcrumb\">{$parts[$i]}</a></li>";
}
?>
</ul>

You'll obviously want to add your own checks in there to see if a valid breadcrumb trail is being created to stop people from breaking your script, but this is essentially the bare script for what you need.

chinto09

thanks Ashley 🙂.