Restrict users from editing post based on the age of the post

How can I restrict users (based on Capabilities) from editing their published posts after a custom amount of time.

For instance, a user that can publish_posts (authors) can not edit a their post if it is older than 3 days, and a user that can moderate_comments (editors) can not edit any posts that are older than 20 days. Obviously, admins can edit anytime.

How is such thing possible?

Solutions Collecting From Web of "Restrict users from editing post based on the age of the post"

I took the example code from the WordPress user_has_cap filter codex page and modified it. Add this code to your theme functions.php:

function restrict_editing_old_posts( $allcaps, $cap, $args ) {

// Bail out if we're not asking to edit or delete a post ...
if( ( 'edit_post' != $args[0] && 'delete_post' != $args[0] )
  // ... or user is admin 
  || ! empty( $allcaps['manage_options'] )
  // ... or user already cannot edit the post
  || empty( $allcaps['edit_posts'] ) )
    return $allcaps;

// Load the post data:
$post = get_post( $args[2] );

// Bail out if the post isn't published:
if( 'publish' != $post->post_status )
    return $allcaps;

$post_date = strtotime( $post->post_date );
//if post is older than 30 days ...
if( $post_date < strtotime( '-30 days' )
  // ... or if older than 4 days and user is not Editor
  || ( empty($allcaps['moderate_comments']) && $post_date < strtotime('-4 days') ) ) {
    $allcaps[$cap[0]] = FALSE;
}
return $allcaps;
}
add_filter( 'user_has_cap', 'restrict_editing_old_posts', 10, 3 );