Recursivly get all files in a directory, and sub directories by extension

Question

I was looking at RecursiveDirectoryIterator and glob to say

" return me a list of files (in an array) based on the extension (for example) .less. Oh and look in all child, grandchild and so on and so forth, excluding . and .. until you find all files matching. "

But I am not sure the best approach to create a recursive function that keeps going well beyond the grand child.

What I have is a mess, its worked for two years - but now I need to refactor and change it up:

public function get_directory_of_files($path, $filename, $extension) {
        if (!is_dir($path)) {
            throw new AisisCore_FileHandling_FileException("Could not find said path: " . $path);
        }

        if (file_exists($filename)) {
            $handler = opendir($path);
            while ($file = readdir($handler)) {
                if ($file != "." && $file != "..") {
                    $this->package_files [] = $file;
                    $count = count($this->package_files);
                    for ($i = 0; $i < $count; $i++) {
                        if (substr(strrchr($this->package_files [$i], '.'), 1) == $extension) {
                            if ($this->package_files [$i] == $filename) {
                                $this->files_got_back = $this->package_files [$i];
                            }
                        }
                    }
                }
            }
        }

        return $this->_files_got_back;
    }

This requires a file name to be passed in and thats not really my thing to do any more. So how can I re-write this function to do the above " pseudo code "

Answer 1

Take a look at this code:

<?php

class ex{

    private function get_files_array($path,$ext, &$results){ //&to ensure it's a reference... but in php obj are passed by ref.

        if (!is_dir($path)) {
            //throw new AisisCore_FileHandling_FileException("Could not find said path: " . $path);
        }

        if ($dir = opendir($path)) {
            $extLength = strlen($ext);

            while (false !== ($file = readdir($dir))) {
                if ($file != '.' && $file != '..'){
                    if (is_file($path.'/'.$file) && substr($file,-$extLength) == $ext){
                        $results[] = $path . '/' . $file; //it's a file and the correct extension
                    }
                    elseif (is_dir($path . '/'. $file)){ 
                        $this->get_files_array($path.'/'.$file, $ext, $results); //it's a dir
                    }               
                }
            }

        }else{
            //unable to open dir
        }
    }

    public function get_files_deep($path,$ext){
        $results = array();
        $this->get_files_array($path,$ext,$results);
        return $results;
    }

}

    $ex = new ex();

    var_dump($ex->get_files_deep('_some_path','.less'));

?>

It will retrieve all the files with the matching extension in the path and it's sub directories.

I hope it's what you need.

Answer 2

This function recursively finds files with a matching ending string

function getDirectoryContents($directory, $extension)
{
    $extension = strtolower($extension);
    $files = array();
    $it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory));

    while($it->valid()) 
    {
        if (!$it->isDot() && endsWith(strtolower($it->key()), $extension))
        {
            array_push($files, $it->key());
        }
        $it->next();
    }
    return $files;
}
function endsWith($haystack, $needle)
{
    return $needle === "" || substr($haystack, -strlen($needle)) === $needle;
}

Used like so print_r(getDirectoryContents('folder/', '.php'));

It converts the extension to lowercase to compare against