adds file upload capabilities to the Contributor Role in WordPress

functions.php

// add file uploads to Contributor role
function add_uploads_to_contribs () {
	global $pagenow;
	
	// grab contribtor role
	$role = get_role ('contributor');
	
	// if this theme is activated, add the upload capability
	if ('themes.php' == $pagenow && isset ($_GET['activated'])) {
		$role -> add_cap ('upload_files');
	} else {
		// remove when deactivated
		$role -> remove_cap ('upload_files');
	}
}
add_action ('load-themes.php', 'add_uploads_to_contribs');