wordpress: api for importing data from text file

gistfile1

<?php
/*
 * This is wordpress API for importing data from text file
 * http://localhost/sandbox/wordpress/wp-content/plugins/data_import/import_data.php
 */

//load wordpress functions
require_once("../../../wp-load.php");

//path of text file from where posts need to be imported
$data_file = 'data.txt';

//get the contents of data file
if(file_exists($data_file))
$data = file_get_contents($data_file);

$isvalidFile       = false;
$inserted_post_ids = array();

if( gettype($data) == 'string' && strstr($data,'~~') && strstr($data,'!!##!!') ){
	$isvalidFile = true;
}

if($isvalidFile) {
	
	$posts = explode('!!##!!', $data);
	$posts = array_filter($posts, 'trim');

	foreach($posts as $post) {

		//get data form text file
		list($post_title,$post_content,$post_type) = explode('~~', $post);
		$post_date     = '2012-12-01 00:00:00';	
		$post_date_gmt = "2012-12-01 00:00:00";
		$post_name     = sanitize_title($post_title);

		//prepare the post array to be inserted in db
		$this_post = array(
					'post_title'    => $post_title,
					'post_content'  => $post_content,
					'post_status'   => 'publish',
					'post_author'   => 1,
					'post_date'     => $post_date,
					'post_date_gmt' => $post_date_gmt,
					'post_name'     => $post_name
				);

		
		//insert the post data
 		$result = wp_insert_post($this_post);

 		//grab the inserted post id & add meta data related with post
		if($result>0) {

			$inserted_post_id = $result;

			//add all post meta info
			add_post_meta( $inserted_post_id, 'content_type', $post_type );
			
			//update the list of inserted post ids
			$inserted_post_ids[] = $inserted_post_id;
		}
	}
}

//if the records inserted, display list of post ids inserted
if(count($inserted_post_ids)>0){
	echo "<ol>";
	foreach($inserted_post_ids as $post_id){
		echo "<li> Post inserted with id: $post_id </li>";
	}
	echo "</ol>";
}