Stephanis.Scan.php

<?php

// Should this use RecursiveDirectoryIterator instead?

namespace Stephanis\Scan;

trait Props {
    public $modified;
    public $owner;
    public $group;
    public $perms;

    function populate( $path ) {
        $this->modified = date( 'c', filemtime( $path ) );
        $this->perms    = substr( sprintf( '%o', fileperms( $path ) ), -4 );
        $this->owner    = posix_getpwuid( fileowner( $path ) )['name'];
        $this->group    = posix_getgrgid( filegroup( $path ) )['name'];
    }
}

class File {
    use Props;

    public $md5;
    public $size;

    public function __construct( $path ) {
        if ( ! file_exists( $path ) ) {
            return null;
        }

        $this->md5  = md5_file( $path );
        $this->size = filesize( $path );

        $this->populate( $path );

        return $this;
    }
}

class Dir {
    use Props;

    public $children = [];

    public function __construct( $path ) {
        if ( ! file_exists( $path ) ) {
            return null;
        }

        $this->populate( $path );

        $files = glob( rtrim( $path, DIRECTORY_SEPARATOR ) . '/*' );
        foreach ( $files as $file ) {
            $this->children[ basename( $file ) ] = is_dir( $file ) ? new Dir( $file ) : new File( $file );
        }

        return $this;
    }
}

// Get data about all files and directories contained within the specified directory:
echo json_encode( new Dir( getcwd() ), JSON_PRETTY_PRINT );