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Post_Type__Not_In class to add a 'post_type__not_in' parameter to WP_Query.
<?php
/**
* This class will cause WP_Query to ignore a 'post_type' parameter when 'post_type__not_in' is set.
*
* Class Post_Type__Not_In
*/
class Post_Type__Not_In {
/**
*
*/
static function on_load() {
add_action( 'pre_get_posts', array( __CLASS__, '_pre_get_posts' ) );
add_filter( 'posts_where', array( __CLASS__, '_posts_where' ), 10, 2 );
add_filter( 'posts_where_paged', array( __CLASS__, '_posts_where' ), 10, 2 );
}
/**
* @param WP_Query $query
*/
static function _pre_get_posts( $query ) {
if ( $post_type__not_in = $query->get( 'post_type__not_in' ) ) {
$query->set( 'post_type', 'any' );
}
}
/**
* @param string $where
* @param WP_Query $query
* @return string
*/
static function _posts_where( $where, $query ) {
if ( $post_type__not_in = $query->get( 'post_type__not_in' ) ) {
global $wpdb;
preg_match( "#(AND {$wpdb->posts}.post_type IN) \('([^)]+)'\)#", $where, $matches );
if( 3 == count( $matches ) ) {
$post_types = explode( "', '", $matches[2] );
if ( ! is_array( $post_type__not_in ) ) {
$post_type__not_in = array( $post_type__not_in );
}
$post_type__not_in = array_map( 'esc_sql', $post_type__not_in );
$post_types = implode( "','", array_diff( $post_types, $post_type__not_in ) );
$new_sql = "{$matches[1]} ('{$post_types}')";
$where = str_replace( $matches[0], $new_sql, $where );
}
}
return $where;
}
}
Post_Type__Not_In::on_load();
<?php
$query = new WP_Query( array(
'post_type__not_in' => array( 'page', 'post' ),
));
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