How to extract all nested tar.gz and zip to a directory in PHP?

I need to extract a tar.gz file in PHP. The file contains many JSON files, tar.gz, zip files, and subdirectories. I need to move only the JSON files to a directory ./Dataset/processing and keep extracting the nested tar.gz and zip to get all the JSON files from there. Those files could also have nested folders/ directories.

The structure is like the following:

origin.tar.gz
 ├───sub1.tar.gz
 │   ├───sub2.tar.gz
 │   ├───├───a.json
 │   ├───├───├───├───├───├───...(unknown depth)
 │   ├───b.json
 │   ├───c.json
 ├───sub3.zip
 │   ├───sub4.tar.gz
 │   ├───├───d.json
 │   ├───├───├───├───├───├───...(unknown depth)
 │   ├───e.json
 │   ├───f.json
 ├───subdirectory
 │   ├───g.json
 ├───h.json
 ├───i.json
 |   ..........
 |   ..........
 |   ..........
 |   many of them

Once it gets extracted ./Dataset will look like this

Dataset/processing
 ├───a.json
 ├───b.json
 ├───c.json
 ├───d.json
 ├───e.json
 ├───f.json
 ├───g.json
 ├───h.json
 ├───i.json
 |   ..........
 |   ..........
 |   ..........
 |   many of them

I know how to extract a tar.gz using PharData in PHP, but it works only at a single level depth. I was thinking if some kind of recursion could make this work for multi-level depth.

$phar = new PharData('origin.tar.gz');
$phar->extractTo('/full/path'); // extract all files in the tar.gz

I have refined my code a bit and tried this, it works for multi-depth but fails when there is a directory(folder or nested folders) that also contains JSON. Can someone help me to extract them as well.

<?php

$path = './';

// Extraction of compressed file
function fun($path) {    
    $array = scandir($path); 
    for ($i = 0; $i < count($array); $i++) {
        if($i == 0 OR $i == 1){continue;}
        else {
            $item = $array[$i];
            $fileExt = explode('.', $item);

            // Getting the extension of the file
            $fileActualExt = strtolower(end($fileExt));
            if(($fileActualExt == 'gz') or ($fileActualExt == 'zip')){
                $pathnew = $path.$item; // Dataset ./data1.tar.gz
                $phar = new PharData($pathnew);
                // Moving the files
                $phar->extractTo($path);
                // Del the files
                unlink($pathnew);
                $i=0;
            }
        }
        $array = scandir($path);


    }
}
fun($path);

// Move only the json to ./dataset(I will add it later)
?>

Thanks in advance.

Solution

I solved it after doing a bit of research. This solves the problem.

There are 3 functions:

recursiveScanProtected(): It extracts all the Compressed files
scanJSON(): It will scan for JSON files and move them to the processing folder.
delete_files(): This function removes everything except the processing folder where have the JSON files, and index.php in the root directory.

<?php

// Root directory
$path = './';

// Directory where I want to extract the JSON files
$path_json = $path.'processing/';


// Function to extract all the compressed files
function recursiveScanProtected($dir, $conn) {
    if($dir != '') {
        $tree = glob(rtrim($dir, '/') . '/*');
        if (is_array($tree)) {
            for ($i = 0; $i < count($tree); $i++) {
                $file = $tree[$i];
                if (is_dir($file)) {
                    recursiveScanProtected($file, $conn); // Recursive call if directory
                } elseif (is_file($file)) {

                    $item = $file;
                    $fileExt = explode('.', $item); 
                    // Getting the extension of the file
                    $fileActualExt = strtolower(end($fileExt));
                    // Check if the file is a zip or a tar.gz
                    if(($fileActualExt == 'gz') or ($fileActualExt == 'zip')){

                        // Moving the file - Overwriting true
                        $phar->extractTo($dir.$i."/", null, true);

                        // Del the compressed file
                        unlink($item);

                        recursiveScanProtected($dir.$i, $conn); // Recursive call
                    }

                }
            }
        }
    }
}
recursiveScanProtected($path, $conn);


// Move the JSON files to processing
function scanJSON($dir, $path_json) {
    if($dir != '') {
        $tree = glob(rtrim($dir, '/') . '/*');
        if (is_array($tree)) {
            foreach($tree as $file) {
                if (is_dir($file)) {
                    // Do not scan processing recursively, but all other directories should be scanned
                    if($file != './processing'){
                        scanJSON($file, $path_json);
                    }
                } elseif (is_file($file)) {

                    $ext = pathinfo($file);

                    if(strtolower($ext['extension']) == 'json'){
                        // Move the JSON files to processing
                        rename($file, $path_json.$ext['basename']);
                    }
                }
            }
        }
    }
}

scanJSON($path, $path_json);

/* 
 * php delete function that deals with directories recursively
 * It deletes everything except ./dataset/processing and index.php
 */
function delete_files($target) {

    if(is_dir($target)){
        $files = glob( $target . '*', GLOB_MARK ); //GLOB_MARK adds a slash to directories returned
        foreach( $files as $file ){
            if($file == './processing/' || $file == './index.php'){
                continue;
            } else{
                delete_files( $file );
            }
        }
        if($target != './'){
            rmdir( $target );
        }
    } elseif(is_file($target)) {
        unlink( $target );  
    }
}

delete_files($path);
?>