print folder list

bull

code that i'm searching:
..first.. it gets list of folders in given directory (nothing else, just folders)
..2nd.. it get 1 random image from every folder that it reads..
..3rd.. it prints these images as links to folder that this image represents..
.. .. this order of steps i thought just now, maybe it is better in another way, but the idea must be clearer now.

i'm just trying to optimize and automize my gallery.. and i'm not very smart in working with php..

thanks.

Installer

Can you clarify what you mean by

...prints them out like links to these folders.

What is "them"--folders or the images in them? What exactly do you want "them" to link to--folders or individual images?

Installer

Here's a function I came up with the other day, based on one in the user notes here.

It will return, in a 2D array, the entries in a directory. "$arr[<directory name>]['files']" will contain the files, and "$arr[<directory name>]['dirs']" will contain the directories It can be made recursive (returning all the entries in all subdirectories) by passing the second argument as bool true. The example code will show you a little better. Maybe you can use it for what you want to do.

function read_dir($dir, $recurse = false) 
{
    static $check = true;
    if ($check) {
        $dir = realpath($dir) . DIRECTORY_SEPARATOR;
        if (!is_dir($dir)) {
            return false;
        }
        if (DIRECTORY_SEPARATOR == '/') {
            $dir = str_replace('\\', '/', $dir);
        } else {
            $dir = str_replace('/', '\\', $dir);
        }
        $check = false;
    }
    $dh = dir($dir);
    $file_array = array();
    while (false !== ($entry = $dh->read())) {
        if (($entry != '.') && ($entry != '..')) {
            if (is_dir($dir . $entry)) {
                $entry .= DIRECTORY_SEPARATOR;
                $file_array[$dir]['dirs'][] = $entry;
                if ($recurse) {
                    $file_array = array_merge($file_array, read_dir($dir . $entry, true));
                }
            } else {
                $file_array[$dir]['files'][] = $entry;
            }
        }
    }
    $dh->close();
    return $file_array;
}

Usage:

if (!($arr = read_dir('./'))) {
    echo "Invalid directory.";
    exit;
} else {
    echo '<pre>';
    print_r($arr);
    echo '</pre>';
}

[Edited to fix bone-headed mistake with "str_replace()".]

bull

i want to output links to these folders not to images. that' s my problem. can you write short example. thanks.

bull

I got short php code that writes out jpg filenames, but in this time i need to print out folder names (just folder names).. any ideas?

<?
print "<b>printing list of jpg files from folder</b><br>";
$z = 0;
$d = dir("./");
while (false !== ($entry = $d->read())) {
if ($entry != "." && $entry != "..") {
$ext = strrchr($entry,'.');
$ext = strtolower($ext);
if ($ext == ".jpg" ){
$filename[$z] = $entry;
print "there is file $filename[$z]<br>";
$z++;
}
}
}
$d->close();
?>

Installer

This should work:

$my_dir = 'path/to/directory/';
$array = read_dir($my_dir);
foreach ($array as $dir) { 
    echo '<a href="' . $my_dir . $dir . '">' . $dir . '</a><br />';
}

function read_dir($dir) 
{
    $dh = dir($dir);
    $dir_array = array();
    while (false !== ($entry = $dh->read())) {
        if (($entry != '.') && ($entry != '..')) {
            if (is_dir($dir . $entry)) {
                $dir_array[] = $entry;
            }
        }
    }
    $dh->close();
    return $dir_array;
}

bull

yes it works. thanks a lot.

this script i want to use in my gallery.
i have folder for example gallery1, gallery2 etc. (in these folders i have index.php which works with output of thumbnails and full size images)

with this script i can list these folders as a links. thats good. i just want to ask is there any way to update this script, so that it takes from every gallery a random picture thumbnail (it has end .thumb.jpg) and outputs:
<a href="$gallery-folder"><img src="./$gallery-folder/random-picture-from-this-gallery"></a>

can it be done somehow?

jazz_snob

Here's a crude method you could use to pick a random picture. I'm sure there are better ways. This might not work well if there are many files.

[edit]
WARNING: BUG in this design, see bpat1434's post, below, for fix
[/edit]

Read the thumbs into an array...call it $files
Count # of thumbs in the folder, call that number $max
Pick a random number between 1 and $max, call it $rnd
pull that file name out of your array $files, ie: $files[$rnd]

I've started using exec() to work w/ files in directory. Here's how to do step 0:

$dir = "path/to/the/folder/with/the/images";
$cmd = "ls -t $dir | grep thumb.jpg";
$files = array();
exec( $cmd, $files, $retval );
// now $files contains your files
$max = count($files);
//...you figure out the rest

Read the manual page on exec()

bull

is there any better way to do it?

bpat1434

BE CAREFUL!!! The value of $max should actually be 1 less than what it is.

Array( 
  [0] = 'red'
  [1] = 'blue'
  [2] = 'black'
  [3] = 'green'
  [4] = 'orange'
);

Given that array, the [man]count/man function will return 5; however, the array index only goes to 4. That's because count starts at "1" while arrays start their indexing at "0". So, one minor fix to Jazz's code would be to do:

$max = count($files)-1;

And using Installer's code would be perfect for you in that situation:

/**
 *  Borrowed from Installer
 */
function read_dir($dir, $recurse = false)
{
    static $check = true;
    if ($check) {
        $dir = realpath($dir) . DIRECTORY_SEPARATOR;
        if (!is_dir($dir)) {
            return false;
        }
        if (DIRECTORY_SEPARATOR == '/') {
            str_replace('\\', '/', $dir);
        } else {
            str_replace('/', '\\', $dir);
        }
        $check = false;
    }
    $dh = dir($dir);
    $file_array = array();
    while (false !== ($entry = $dh->read())) {
        if (($entry != '.') && ($entry != '..')) {
            if (is_dir($dir . $entry)) {
                $entry .= DIRECTORY_SEPARATOR;
                $file_array[$dir]['dirs'][] = $entry;
                if ($recurse) {
                    $file_array = array_merge($file_array, read_dir($dir . $entry, true));
                }
            } else {
                $file_array[$dir]['files'][] = $entry;
            }
        }
    }
    $dh->close();
    return $file_array;
}
?>

You could use that to do:

<?php

$files = read_dir('.', TRUE);

foreach($list as $directory => $arr1)
{
  $max = count($files[$directory]['files'])-1;
  $rand[$directory] = $files[$directory]['files'][rand(0, $max)];
  echo '<a href="'.$directory.'/index.html"><img src="'$directory.'/images/'.$rand.'" />'.$directory.'</a>';
}
?>

~Brett

jazz_snob

bpat1434 wrote:
Given that array, the [man]count/man function will return 5; however, the array index only goes to 4. That's because count starts at "1" while arrays start their indexing at "0". So, one minor fix to Jazz's code would be to do:
$max = count($files)-1;

Good eyes bpat1434 🙂

bull

i dont get result.. :/

can anyone help me with finishing bpat1434 solution or give something different.
i'll repeat what code i'm searching:
..first.. it gets list of folders in given directory (nothing else, just folders)
..2nd.. it get 1 random image from every folder that it reads..
..3rd.. it prints these images as links to folder that this image represents..
.. .. this order of steps i thought just now, maybe it is better in another way, but the idea must be clearer now.

i'm just trying to optimize and automize my gallery.. and i'm not very smart in working with php..

thanks.

Installer

..first.. it gets list of folders in given directory (nothing else, just folders)

We've already posted a lot of code that will do that. Putting that to work will make your next two steps easy to do. And if you want to do "2nd" and "3rd" you will need more than "just folders". You will also need (at least one of) the file names from each folder.

..2nd.. it get 1 random image from every folder that it reads..

See "first".

..3rd.. it prints these images as links to folder that this image represents..

What do you mean "links to folder"? Do you mean you will have an index file in each folder? That's what I've been assuming.

Can you show us what you've done so far (code), and tell us what's gone right and wrong with it? If you think you've now finalized what you want to do...

bull

i'll try to explain what have and what needs to be done..

structure of my web:

./gallery //main gallery
./gallery/folder1, folder2, folder3 .. etc
each folder contains pictures, thumbnails, info.txt

./gallery/index.php
//in this script img src is direct link. i'd like that it be random picture for every galery

<?
$my_dir = './';
$array = read_dir($my_dir);
foreach ($array as $dir) {
    echo '<a href="' . $my_dir . $dir . '"><img src="' . $dir . '/'.$dir.'.jpg"></a><br />';
}
function read_dir($dir)
{
    $dh = dir($dir);
    $dir_array = array();
    while (false !== ($entry = $dh->read())) {
        if (($entry != '.') && ($entry != '..')) {
            if (is_dir($dir . $entry)) {
                $dir_array[] = $entry;
            }
        }
    }
    $dh->close();
    return $dir_array;
}
?>

./gallery/read-info.php
this little script i need to include in index.php so that folder links outputs together with info.txt content(it's in all folders and has various content - gallery description )..

<?php
$fails = ".$FODER-NAME-THERE/info.txt";
$fh = fopen($fails, 'r');
$theData = fread($fh, filesize($fails));
fclose($fh);
echo $theData; 
?>

sorry for my bad english..

Installer

OK, bull, hang in there...

I can't look at your code real closely right now but I will the first chance I get. Maybe by then someone else will have given you the help you need. At any rate, you won't be abandoned.

bull

ok, i'll be watching for replies to this topic.

bpat1434

Bulll: Read my article on creating an online photo gallery. That should help you. Out in teh meantime as well. I'll see if I can't come up with something simpler as well.

~Brett

bull

thanks, i will read it, cause i want to solve this problem.

bpat1434

Okay, so here's what I got working:

<?php

// The root of the image gallery:
$root_dir = '../../articles/imagegallery/example/images/photos';

function read_dir($dir, $recur = FALSE)
{
	static $check = true;
	static $exts	= array('bmp', 'gif', 'jpg', 'jpeg', 'png', 'tiff');
	if($check)
	{
		$dir = realpath($dir).DIRECTORY_SEPARATOR;
		if(!is_dir($dir))
		{
			return FALSE;
		}
		if(DIRECTORY_SEPARATOR == '/')
		{
			$dir = str_replace('\\', '/', $dir);
		}
		else
		{
			$dir = str_replace('/', '\\', $dir);
		}

	$check = FALSE;

}

$dh = dir($dir);
$files = array(); // Create an empty array to hold our file info
while(FALSE != ($entry = $dh->read()))
{
	if($entry != '.' && $entry != '..')
	{
		if(is_dir($dir.$entry))
		{
			$entry .= DIRECTORY_SEPARATOR;
			$files[$dir]['dirs'][] = $entry;
			if($recur)
			{
				$files = array_merge($files, read_dir($dir.$entry, true));
			}
		}
		else
		{
			if( in_array( ($ext = substr($entry, strpos($entry, '.')+1)), $exts) )
			{
				$files[$dir]['files'][] = $entry;
			}
		}
	}
}
$dh->close();

return $files;
}

function htmlpath($realpath) {
   //$realpath=realpath($relative_path);
	 $realpath = str_replace('\\', '/', $realpath);
   $htmlpath=str_replace($_SERVER['DOCUMENT_ROOT'],'',$realpath);
   return $htmlpath;
}

// Read the file list into an array
$files = read_dir($root_dir, true);

foreach($files as $dir => $item)
{
	if(@$files[$dir]['files'])
	{
		if(!strpos($dir, 'thumbs'))
		{
			$max = count($files[$dir]['files'])-1;
			$image = $files[$dir]['files'][rand(0, $max)];
			$dir = htmlpath($dir);
			$link = $dir.'index.php'; // Link to index.php file in each directory
			$imgpath = $dir.$image; // Path to image
			/**
			 * Define your formatting here.  I used list elements.
			 */
			echo '<li><a href="http://localhost/'.$link.'"><img src="'.$imgpath.'" style="width: 100px; height: 100px;" /><br>'.htmlpath($dir).'</a></li>'."\n";
		}
	}
}

?>

Hopefully you can follow it. Just change the $root_dir path and you should be able to get what you need.

~Brett

bull

lets have a look!