save WordPress query, alter query, reset query

main-query-and-temp-query.php

			<div class="grid-layout">
				<?php
				// main query 
				global $post;
				$paged = (get_query_var('paged')) ? get_query_var('paged') : 0;

				$main_query_args = array(
						'post_type'  	  => 'post',
						'posts_per_page' => 10,
						'category'       => 1,
						'paged' => 	$paged
				);

				$main_query = new WP_Query( $main_query_args );
        $temp_query = $wp_query; // save the main query to recover it later
        $wp_query = NULL;
        $wp_query = $main_query; // set wp_query to our main query 
        $pagination = array(
            'base' => '%_%',
            'format' => '?page=%#%',
            'total' => $main_query->max_num_pages,
            'prev_next' => True,
            'prev_text' => __( '<< Previous' ),
            'next_text' => __( 'Next >>' )
        );
     
				if ( $main_query->have_posts() ) :
						while ( $main_query->have_posts() ) : $main_query->the_post(); 
								get_template_part( 'template-parts/content', 'grid-posts' );
						endwhile;

				endif;

				?>
			</div><!-- grid-layout -->

			<?php 
						$wp_query = NULL;
						$wp_query = $temp_query; // reset the wp query 
						?>