Disable WordPress Search

disable-wordpress-search.php

function fb_filter_query( $query, $error = true ) {
	
	if ( is_search() ) {
		$query->is_search = false;
		$query->query_vars[s] = false;
		$query->query[s] = false;
		
		// to error
		if ( $error == true )
			$query->is_404 = true;
	}
}

add_action( 'parse_query', 'fb_filter_query' );
add_filter( 'get_search_form', create_function( '$a', "return null;" ) );

create_function is depricated. and also query[s] is depricated.

How I solved this:

/*------------------------------------------------------------------------------------------
# Disables WordPress Search feature
------------------------------------------------------------------------------------------*/

function fb_filter_query( $query, $error = true ) {
	
	if ( is_search() & !is_admin()) {
		$query->is_search = false;
		$query->query_vars['s'] = false;
		$query->query['s'] = false;
		
		// to error
		if ( $error == true )
			$query->is_404 = true;
	}
}

add_action( 'parse_query', 'fb_filter_query' );
add_filter( 'get_search_form', function($a) {return null;});

... @InstanceFactory When i used your code above, and i type in my url www.blah.com/?s=test, i get a message on my page that says: "The page can’t be found. It looks like nothing was found at this location.". I need to use the ?s= parameter as a regular parameter, not a search. How can this be done? Thanks.

@adrearubin Well, I'm not that deep within WP. But I think you need to use a 'free' parameter, means, one that is not used by WP.