How To Mass Delete WP Post

It is always a torture to delete a lot of wordpress post at once as the maximum number of post shown is 15 at the edit post page.

This means that I can only delete 15 post at any one time and it is a headache when i need to to remove hundreds of post.

I have found a relative easy way to delete more than 15 post at once without the need for plugins.

Changed this line in wp-adminincludespost.php (823 in WP 2.8):

$posts_per_page = 15;

to

$posts_per_page = 400;

I found this method from interstice.biz.

Hope it is helpful to anyone who may need it.

Cheers.