Migaration script scalaton

migration_post_type.php

<?php


function test_callback_migration() {

	if ( ! is_admin() && isset( $_GET['migrate_data'] ) ) {

		if ( current_user_can( 'administrator' ) ) {

			$page = filter_input( INPUT_GET, 'pg', FILTER_SANITIZE_NUMBER_INT );

			if ( empty( $page ) ) {
				$page = 1;
			}

			$limit = 10;

			// Query all the replies.
			$query = new WP_Query(
			array(
				'post_type'      => 'post',
				'post_status'    => 'publish',
				'paged'          => $page,
				'posts_per_page' => $limit,
				'order'          => 'ASC',
			)
			);

			if ( $query->have_posts() ) {

				while ( $query->have_posts() ) {

					$query->the_post();

					echo $post_id = get_the_ID();
					echo '<br/>';

					// Your logic goes here.


				}

				wp_reset_postdata();

				?>
				<script>
					window.location.href = '<?php echo site_url() . '/?migrate_data=1&pg=' . ( $page + 1 ); ?>';
				</script>
				<?php

			} else {

				echo 'You are caught!!!! ;)';
				die;
			}
		}

	}

}

add_action( 'init', 'test_callback_migration' );