dynamic formation of array with incremental depth in PHP

Question

I want to use a function to recursively scan a folder, and assign the contents of each scan to an array.

It's simple enough to recurse through each successive index in the array using either next() or foreach - but how to dynamically add a layer of depth to the array (without hard coding it into the function) is giving me problems. Here's some pseudo:

function myScanner($start){

    static $files = array();

    $files = scandir($start);
    //do some filtering here to omit unwanted types

    $next = next($files);


    //recurse scan

    //PROBLEM: how to increment position in array to store results
    //$next_position = $files[][][].... ad infinitum

    //myScanner($start.DIRECTORY_SEPARATOR.$next);
}

any ideas?

Answer 1

Try to use this function (and edit it for your demands):

function getDirTree($dir,$p=true) {
    $d = dir($dir);$x=array();
    while (false !== ($r = $d->read())) {
     if($r!="."&&$r!=".."&&(($p==false&&is_dir($dir.$r))||$p==true)) {
      $x[$r] = (is_dir($dir.$r)?array():(is_file($dir.$r)?true:false));
     }
    }

    foreach ($x as $key => $value) {
     if (is_dir($dir.$key."/")) {
      $x[$key] = getDirTree($dir.$key."/",$p);
     }
    }

    ksort($x);
    return $x;
}

It returns sorted array of directories.

Answer 2

Try something like this:

// $array is a pointer to your array
// $start is a directory to start the scan
function myScanner($start, &$array){
  // opening $start directory handle
  $handle = opendir($start);

  // now we try to read the directory contents
  while (false !== ($file = readdir($handle))) {
    // filtering . and .. "folders"
    if ($file != "." && $file != "..") {
      // a variable to test if this file is a directory
      $dirtest = $start . DIRECTORY_SEPARATOR . $file;

      // check it
      if (is_dir($dirtest)) {
        // if it is the directory then run the function again
        // DIRECTORY_SEPARATOR here to not mix files and directories with the same name
        myScanner($dirtest, $array[$file .  DIRECTORY_SEPARATOR]);
      } else {
        // else we just add this file to an array
        $array[$file] = '';
      }
    }
  }

  // closing directory handle
  closedir($handle);
}

// test it
$mytree = array();
myScanner('/var/www', $mytree);

print "<pre>";
print_r($mytree);
print "</pre>";