WordPress: Simple bulk page importer

gga-import-pages.php

<?php
/*
Plugin Name: GGA Import Pages
Description: Quick plugin to bulk import a list of pages <a href="admin-ajax.php?action=gga_import_pages">[Import Now]</a>
*/

add_action( 'wp_ajax_gga_import_pages', 'gga_import_pages' );
function gga_import_pages() {

	global $post;

	$results = new stdClass();
	$results->new_pages = array();
	$results->updated_pages = array();

	// read list of pages

	$filedata = explode("\n", file_get_contents (plugin_dir_path( __FILE__ ) . 'pagelist.txt'));

	foreach ($filedata as $line) {

		if ('' === trim($line))
			continue;

		$pagedata = explode('|', $line);

		$title = trim($pagedata[0]);
		$slug = trim($pagedata[1]);
		$author = 4;
		$status = 'publish';
		$post_type = 'page';

		$args = array(
			'pagename'     => $slug,
			'post_type'   => $post_type,
			'post_status' => 'any',
		);


		$query = new WP_Query( $args );

		if (!$query->have_posts()) {
			$post_id = wp_insert_post( array(
				'post_name' => wp_unique_post_slug( sanitize_title( $slug ), $post->ID, $status, $post_type, 0 ),
				'post_title' =>  $title,
				'post_status' => $status,
				'post_type' => 'page',
				'post_author' => $author,
				 ));

			$results->new_pages[] = get_permalink($post_id);
		}
		else {
			$query->the_post();

			wp_update_post(array(
				'ID' => $post->ID,
				'post_name' => wp_unique_post_slug( sanitize_title( $slug ), $post->ID, $status, $post_type, 0 ),
				'post_title' =>  $title,
				'post_status' => $status,
				'post_type' => $post_type,
				'post_author' => $author,
				));

			$results->updated_pages[] = get_permalink($post->ID);
		}

		wp_reset_query();

	}


	echo json_encode($results);
	die();
}