StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POPHP Looping through array after shuffle() causes error
primarykey
Id
8989511
data
AcceptedAnswerId
8989534
AnswerCount
3
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2012-01-24T15:34:37.470
FavoriteCount
0
LastActivityDate
2012-01-24T15:36:49.280
LastEditDate
LastEditorUserId
0
OwnerUserId
220761
ParentId
0
PostTypeId
1
Score
1
ViewCount
727
LastEditorDisplayName
text
Body
I'm getting the following error after shuffling an array, then trying to loop through it. I'm trying to randomize the order of post terms from the $tags variable. <blockquote> Warning: Invalid argument supplied for foreach() </blockquote> Here is where the error is happening <pre><code>$tags = wp_get_post_terms( $post->ID , $taxonomy, $tax_args); $tags = shuffle($tags); if ($tags) { foreach ($tags as $tag) { // so on ... </code></pre> and the full function <pre><code>$backup = $post; // backup the current object $taxonomy = 'character' ;// e.g. post_tag, category, custom taxonomy $param_type = 'character'; // e.g. tag__in, category__in, but genre__in will NOT work $post_types = get_post_types( array('public' => true), 'names' ); $tax_args=array('orderby' => 'none'); $tags = wp_get_post_terms( $post->ID , $taxonomy, $tax_args); $tags = shuffle($tags); if ($tags) { foreach ($tags as $tag) { $args=array( "$param_type" => $tag->slug, 'post__not_in' => array($post->ID), 'post_type' => $post_types, 'orderby' => 'rand', 'caller_get_posts' => 1 ); $my_query = null; $my_query = new WP_Query($args); if( $my_query->have_posts() ) { while ($my_query->have_posts()) : $my_query->the_post(); ?> <h3><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title(); ?>"><?php the_title(); ?></a></h3> <?php endwhile; } } } $post = $backup; // copy it back wp_reset_query(); // to use the original query again </code></pre> Does anyone see anything wrong with that code? Any explanation much appreciated. Thanks!!!
Tags
<php><wordpress><loops><shuffle>
Title
PHP Looping through array after shuffle() causes error
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USj-man86
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
3. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POPHP Looping through array after shuffle() causes error
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. COWhat happens if you remove the shuffle function? - Do you still get the error?
 singulars
 PostPostId
 POPHP Looping through array after shuffle() causes error
 UserUserId
 USAndreas Stokholm
2. COThat error basically tells you that $tags is no Array when you pass it to foreach. Did you try debugging $tags. What is the result?
 singulars
 PostPostId
 POPHP Looping through array after shuffle() causes error
 UserUserId
 USFlorian Rachor

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.