PHP create json file tree structure from flat array

Question

I have a method which looks through a directory and returns an array of the file structure, an example of this is as follows;

Array
(
    [0] => filename.png
    [directory] => Array
        (
            [subdirectory] => Array
                (
                    [0] => filename.jpg
                )

        )

    [directory] => Array
        (
            [0] => filename.png
        )

    [directory] => Array
        (
        )

    [directory] => Array
        (
            [0] => filename.png
        )

    [directory] => Array
        (
            [0] => filename.png
        )

)

The code that I used to build that up is as follows;

function dirToArray($dir) {
    $contents = array();

    foreach (scandir($dir) as $node) {
        if ($node == '.' || $node == '..') continue;

        if (is_dir($dir . '/' . $node)) {
            $contents[$node] = dirToArray($dir . '/' . $node);
        } else {
            $contents[] = $node;
        }
    }

    return $contents;
}

I need flatten this down so i can display it, exactly like what you see here;

filename.png
directory
.. subdirectory
.. .. filename.png
directory
.. filename.png
directory
.. filename.png
directory
.. filename.png

The problem is, i need to input the data in a json structure that doesnt change. The description of the structure is as follows: Full path to the file then text to display and lastly 'leaf' ( file = true, directory = false )

This is how it should look;

[ ['fullpath', 'displaytext', 'true'],['fullpath', 'displaytext', 'false'] ]

I'm really confused on how to go about this, any help would be greatly appreciated.

Thank you

@eeya no, im not sure where to start turning it into the required output — BigJobbies
– BigJobbies, Commented Nov 1, 2017 at 1:27

jh1711 · Accepted Answer · 2017-11-01 02:44:54Z

1

My approach would be:

 $res=[]; 
 function flatten ($in, $dir, $dots, &$result) { 
   $tmp = [];
   if (is_array($in)) { 
     $tmp[0] = $dir;
     $tmp[1] = $dots.'Directory'; //displaytext
     $tmp[2] = false;
     $result[] = $tmp;
     $dots = $dots.'.. ';
     foreach($in as $k => $v) flatten($v, $dir.'/'.$k, $dots, $result); 
   } else {
     $tmp[0] = $dir.'/'.$in;
     $tmp[1] = $dots.$in; //displaytext
     $tmp[2] = true;
     $result[] = $tmp;
   }
 }
 flatten($array, '','', $res); //$array is the array you created
 echo json_encode($res);

But the code is not tested. The idea is to concationate the keys (directories) recursively, until you reach the leafs (files), and store everything in an array that gets passed by reference.

The last edit should finally fix it.

edited Nov 1, 2017 at 2:44

answered Nov 1, 2017 at 1:27

jh1711

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9 Comments

BigJobbies Over a year ago

This is looking good ... But how would i add the .. before directories and .. .. before subdirectories ... Is that possible?

jh1711 Over a year ago

Thanks @ManuelOtto. Too easy to forget :)

jh1711 Over a year ago

@BigJobbies, I'm not sure where you want the dots could you elaborate.

BigJobbies Over a year ago

@jh1711 if you scroll up to the question, the text needs to output the same as that ... i.e filename.png directory .. subdirectory .. .. filename.png directory .. filename.png directory .. filename.png directory .. filename.png

BigJobbies Over a year ago

@jh1711 actually, i'll show you exactly what i mean with the output generated by your answer :) ... I'll just hack up a pastebin and be right back

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