What is wrong with this query in wordpress?

Question

I have the following query

query_posts('category_name='.$settings['categorieslider']&'posts_per_page='.$settings['numberofslides']);

and for some reason it's not working properly.

Answer 1

You should write cat instead of category_name

Answer 2

try below code

query_posts('category_name='.$settings["categorieslider"].'&posts_per_page='.$settings['numberofslides']);