Expose is my port of the popular rails gem, decent_exposure.
DRY up your code, by letting expose take care of instantiating objects from parameters passed in through requests.

You can call expose two ways:

expose('user')

or

expose('user', function(){
  return new User;
});

By default, Expose will try to guess the correct type of what you are trying to expose based on the name of the exposure.
so:
expose('user')
=> Object(User)

expose('story')
=> Object(Story)

expose('random_object_thats_not_defined')
=> NULL

Expose will create a variable for any objects it instantiates.

So from above, we have:

$user
$story
$some_random_object_thats_not_defined


Assuming a post/get request passes in the following data:

$_POST['user'] = array('firstname' => 'john', 'lastname' => 'Mayer')

then:

expose('user')
=> Object(User) array(2){'firstname' => 'John', 'lastname' => 'Mayer' }

echo $user->firstname
=> "John"

Usage:
<?php
  require('lib/Expose.class.php')
  expose('user') //- new User
  expose('story') //- new Story ..etc
  // it can also accept an anonymous block of code.

  expose('user_is_valid', function(){
    return $user->is_valid;
  })

  // now in your code, you can use two new variables, $user, and $story


?>
Example:

index.php
<?php
  expose('user');
  expose('story');
  expose('stories', Story::all());
  echo render('index', array('layout' => 'application'));
?>

view (using haml):
%form{:method => "POST", :action => "index"}
  %dl
    %dt
      input#title{:type => "text", :name => "story[title]", :placeholder => "title", :required => "required", :value => $story->title}

    %dt
      %textarea#content{:name => "story[content]", :required => "required"}= $story->content
    %dt
      %input#e %small Hate these things.  But its the only way for us to let you know Careen from NY likes your story =)
    %dt
      %input#password{:type => "text", :name => "user[password]", :placeholder => "password", :required => "required"}
    %dt
      %small You're done.
    %dt
      %input#submit{:type => "submit", :value => "Done"}

- foreach($stories as $ustory)
    %article
      %header
        %h2= $ustory->title
        %p Shared August 30, 20011 at 5:04 p.m. (UTC)
      %p= $ustory->content


Regards,

Dante Elrik
delrik[a-t]elrikgroup.(are_you_human ? com : null)