Create multiple Search functions for posts & custom post types and everything

Create Multiple Search Functions for Everything

/* Search Everything*/
function SearchFilter($query) {
$post_type = $_GET['post_type'];
if (!$post_type) {
    $post_type = 'any';
}
if ($query->is_search) {
    $query->set('post_type', $post_type);
};
return $query;
}  

add_filter('pre_get_posts','SearchFilter');

/* Display Search Field */
<form class="headerForm" role="search" action="<?php bloginfo( 'url' ); ?>/" method="get" id="searchform">
    <input type="text" name="s" class="s" id="s" value="" placeholder="Search"/> 
    <button><?php _e("Search");?></button>
</form>

/* news search form add */
<input type="hidden" name="post_type" value="post" />

/* custom post type listing search form add */
<input type="hidden" name="post_type" value="customtypename" />

/* entire site search don't add anything for value="" */