WordPress: Get paginated query results.

get-paginated-query-results.php

<?php

/**
 * Runs WP_Query and gets all results using pagination.
 *
 * @param array $query_args List of WP_Query args.
 * @return array
 */
function get_paginated_query_results( $query_args ) {

	$results = [];

	if ( ! isset( $query_args['posts_per_page'] ) ) {
		$query_args['posts_per_page'] = 50;
	}

	if ( ! isset( $query_args['paged'] ) ) {
		$query_args['paged'] = 1;
	}

	if ( ! isset( $query_args['update_post_meta_cache'] ) ) {
		$query_args['update_post_meta_cache'] = false;
	}

	if ( ! isset( $query_args['update_term_meta_cache'] ) ) {
		$query_args['update_term_meta_cache'] = false;
	}

	$query = new \WP_Query( $query_args );

	while ( $query->have_posts() ) {

		$results = array_merge( $results, $query->posts );

		if ( $query->max_num_pages > 1 ) {
			$query_args['paged']++;
			$query = new \WP_Query( $query_args );
		} else {
			break;
		}
	}

	return $results;
}