pathinfo

• The pathinfo function in PHP returns an associative array with information about a file path. The array should contain the keys dirname, basename, extension, and filename.

  PHP

  $pathinfo = pathinfo('/path/to/foo.bar');
  var_export($pathinfo);
   
  //=> array (
  //     'dirname'   => '/path/to',
  //     'basename'  => 'foo.bar',
  //     'extension' => 'bar',
  //     'filename'  => 'foo',
  //   )

  Ruby does not have an equivalent method to pathinfo. However, the File class contains individual methods that can return the same information. It is preferable to use these individual methods: File.dirname, File.basename, and File.extname.

  If a pathinfo method is convenient, one approach would be to take advantage of Ruby’s open classes to monkeypath a new method onto the File class:

  Ruby

  class File
    def self.pathinfo(path)
      { :basename  => basename(path),
        :dirname   => dirname(path),
        :extension => extname(path),
        :filename  => basename(path, extname(path))
      }
    end
  end

  You could then call File.pathinfo:

  Ruby

  pathinfo = File.pathinfo('/path/to/foo.bar')
  p pathinfo
   
  #=> { :basename  => "foo.bar",
  #     :dirname   => "/path/to/foo.bar", 
  #     :extension => ".bar"
  #     :filename  => "foo" }

  The snippet above is roughly equivalent but has a minor difference from the PHP version. The File.extname method returns the leading period (.bar) but the extension element returned by PHP’s pathinfo does not.

  see also

  • dirname
  • basename
  • parse_url
  • realpath

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