Build a custom query with pre_get_posts

build-custom-query.php

<?php
/**
 * Build a custom query
 *
 * @param $query obj The WP_Query instance (passed by reference)
 *
 * @link https://codex.wordpress.org/Class_Reference/WP_Query
 * @link https://codex.wordpress.org/Class_Reference/WP_Meta_Query
 * @link https://codex.wordpress.org/Plugin_API/Action_Reference/pre_get_posts
 */
function myplugin_pre_get_posts( $query ) {
	// check if the user is requesting an admin page 
	// or current query is not the main query
	if ( is_admin() || ! $query->is_main_query() ){
		return;
	}

	$meta_query = array();

	// add meta_query elements
	if( !empty( get_query_var( 'key1' ) ) ){
		$meta_query[] = array( 'key' => 'key1', 'value' => get_query_var( 'key1' ), 'compare' => 'LIKE' );
	}

	if( !empty( get_query_var( 'key2' ) ) ){
		$meta_query[] = array( 'key' => 'key2', 'value' => get_query_var( 'key2' ), 'compare' => 'LIKE' );
	}

	if( count( $meta_query ) > 1 ){
		$meta_query['relation'] = 'AND';
	}

	if( count( $meta_query ) > 0 ){
		$query->set( 'meta_query', $meta_query );
	}
}
add_action( 'pre_get_posts', 'myplugin_pre_get_posts', 1 );

Hi there, thanks for this great peace of code.

Perhaps you can help me out with an issue regarding your code...

https://stackoverflow.com/questions/74335018/pre-get-posts-with-meta-query-effects-static-pages-in-woocommerce