Navigating Directories - confused

[Jason_Batten]

Hey all,

I done this tutorial but I am confused with part of the code.

//list the sub directories 
while ($item = readdir($dp)) 
{ 
if ((is_dir($item)) AND (substr($item, 0, 1) != '.')) 
{ 
echo "$item<br>"; 
} 
}

I just don't understand exactly how it works. I tried to read up on the substr function but don't understand how this certain script works.

I would also like to be able to display all the files in the current AND sub dirctories. I tried playing around with the "(substr($item, 0, 1) != '.')" part but no go. Probably work it out once I know exactly how the script works.

Cheers for any help :bemused:

[bpat1434]

Basically it says this:

$item is a list of all items currently in the directory that is open (or called thorugh readdir()).

Then, substr($item, 0, 1) looks for the FIRST character to be a ".". If so, it is either: . or .. meaning that it is either the current directory, or the link to the parent directory.

So if it's not one of those, then it lists it.

<?php
//list the sub directories

$dp = '.';

echo '<p style="font-weight: bold;">Contents Of: <i>'.$dp.'</i></p>
	<p class="margin: 0; padding: 0; color: #090;">+ '.$dp.'</p>';
$handle = opendir($dp);
while ($item = readdir($handle)) 
{ 
	if ((substr($item, 0, 1) != '.')) 
	{ 
		if(is_dir($item))
		{
			$handle2 = opendir('./'.$item);
			echo '<p style="margin: 0; padding: 0; color: #090;">|&nbsp;+&nbsp; <b>'.$item.'</b></p>';
			while($item2 = readdir($handle2))
			{
				if ((substr($item2, 0, 1) != '.'))
				{
					echo '<p style="margin: 0; padding: 0;">|&nbsp;&nbsp;|--&nbsp;'.$item2.'</p>';
				}
			}
			closedir($handle2);
		}
		else
		{
			echo '<p style="margin: 0; padding: 0;">|&nbsp;'.$item.'</p>';
		}
	} 
}
closedir($handle);
?>

Hope that helps.

That outputs:

Contents Of: .

+ .
| +  Local_Hero
|  |-- header_gen.php
|  |-- index.php
|  |-- replacement.js
|  |-- fonts
|  |-- cache
|  |-- error_log
|  |-- test.php
| threat_level.php
| +  adityakonda
|  |-- functions.phps
|  |-- userview.phps
| mime_type.jpg
| readdir.php

~Brett

[Jason_Batten]

Alrighty, cheers

BUT 😃

My directory is setup like below, sorry for the mess.

root/
script.php

root/sub-directory1/
file.php

root/sub-directory2/sub-sub-directory1/
file2.php

The script only lists the sub-directory 1 & 2 and not the sub-sub-directory1, why is that 😕

[bpat1434]

I edited my code above. I'll work for the next 30 minutes to get something a little more in depth for you.

Give me like 30 minutes to work on it, then I'll post why and how to fix it!!

~Brett

[bpat1434]

I seriously don't know. Have no idea why it won't give me a third set of sub-directories.

Here's the code I have been playing around with:

<?php
//list the sub directories

$dp = './';
echo '<p style="font-weight: bold;">Contents Of: <i>'.$dp.'</i></p>';

$handle = opendir($dp);
echo '<p class="margin: 0; padding: 0; color: #090;">+ '.$dp.'</p>';
while ($item = readdir($handle)) 
{ 
	if ((substr($item, 0, 1) != '.')) 
	{ 
		if(is_dir($item))
		{
			$handle2 = opendir($dp.$item);
			echo '<p style="margin: 0; padding: 0; color: #090;">|&nbsp;+&nbsp; <b>'.$item.'</b></p>';
			while($item2 = readdir($handle2))
			{
				if ((substr($item2, 0, 1) != '.'))
				{
					if(is_dir($item2))
					{
						$handle3 = opendir($dp.$item.'/'.$item2);
						echo '<p style="margin: 0; padding: 0; color: #090;">|&nbsp;|&nbsp;+&nbsp; <b>'.$item2.'</b></p>';
						while($item3 = readdir($handle3))
						{
							if ((substr($item3, 0, 1) != '.'))
							{
								echo '<p style="margin: 0; padding: 0;">|&nbsp;&nbsp;|&nbsp;&nbsp;|--&nbsp;'.$item3.'</p>';
							}
						}
						closedir($handle3);
					}
					else
					{
						echo '<p style="margin: 0; padding: 0;">|&nbsp;&nbsp;|--&nbsp;'.$item2.'</p>';
					}
				}
			}
			closedir($handle2);
		}
		else
		{
			echo '<p style="margin: 0; padding: 0;">|&nbsp;'.$item.'</p>';
		}
	} 
}
closedir($handle);
?>

It will list everything above, but not in the sub-sub-directory. Not sure why.

I know that this is not the BEST nor easiest way to do it. I know there are functions for reading multiple directores out there.

~Brett

[Jason_Batten]

Thanks for the time you have spent trying to help me with the code 🙂, I understand it now.

The code works fine on my computer but doesn't work correctly online. Must have something to do with remote files 😕

But there must be another way 🙁

My host is using PHP 4 atm and I use it on my own pc. What are you working with?

[bpat1434]

PHP 4. I'm not sure either. I can say I'm not that experienced with the working of remote files, so I was taking a guess.

Perhaps Weedpacket or Dale can better answer/explain what is goign on.

~Brett