Patch to allow 'post_parent=0' queries to be executed properly

[stefano.verna]

I found that the following piece code doesn't work as it should:

<?php get_posts('post_type=page&post_parent=0'); ?>

In fact, it returns all the pages, instead of just the children of the root (that is, the pages with depth = 1). This is due to the check that is being made in WP_Query:

if ( $q['post_parent'] )
$where .= $wpdb->prepare( " AND $wpdb->posts.post_parent = %d ", $q['post_parent'] );

So, as $qpost_parent? is 0 (aka false), the relative action gets skipped. Just replacing this check with the more appropriate is_integer() solves the problem.

Patch attached.

[stefano.verna]

The Patch

[stefano.verna]

sorry.. just realized that the correct function to use is is_numeric()

[markjaquith]

(In [9774]) Allow post_parent=0 queries to work. props stefano.verna. fixes #8085

[ryan]

See #8284