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I am running a multisite network and i have setup a sql query that uses swith_to_blog(); and queries the posts.

Is there a way that i can declare the query inside a new WP_Query and actually merge that query with another?

Basically if i do this:

$number1 = new WP_Query($multisitequery);

Can i merge it with:

$number2 = new WP_Query($normalquery);

$normalquery holds settings like pagination, per page, excerpt, title etc... on a portfolio shortcode.

I would like it to include queried posts from my new $multisite query.

Can this be achieved? Just wanting to save me from creating a whole new shortcode setup lol

Many thanks in advance. Rory


What i have is:

$portfolio = array();
$portfolio = $settings;

Further down my portfolio function "after all the $settings['options']" i have:

$portfolio_query = new WP_Query( $portfolio );

the $portfolio_query uses a loop on a page template.

I want to add an extra query into this like so:

global $wpdb, $blog_id, $post;

$blogs = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM wp_blogs ORDER BY blog_id" ) );

$globalcontainer = array();

foreach ($blogs as $blog){


   $globalquery = query_posts($args);

   $globalcontainer = array_merge( $globalcontainer, $globalquery );


where i assume that $globalcontainer would be the array to merge into the wp_query();.

So taking onboard what you have replied with, in theory i could simply:

$mergedqueryargs = array_merge($portfolio , $globalcontainer);
$portfolio_query = new WP_query($mergedqueryargs);

Would that be correct?

Second, regarding the array_merge array key overwrite..... How would i go about stopping an overwrite?

share|improve this question

You won't do much good just merging the arguments, you need to merge the resulting posts array and the post_count count. This works for me:

//setup your queries as you already do
$query1 = new WP_Query($args_for_query1);
$query2 = new WP_Query($args_for_query2);

//create new empty query and populate it with the other two
$wp_query = new WP_Query();
$wp_query->posts = array_merge( $query1->posts, $query2->posts );

//populate post_count count for the loop to work correctly
$wp_query->post_count = $query1->post_count + $query2->post_count;
share|improve this answer
This looks good, but I am looking for a solution that can be used with the pre_get_posts hook - i.e., I need to modify an existing WP_Query object. I have tried using '$wp_query->init();' instead of '$wp_query = new WP_Query();', but that seems to mess things up. Any suggestions? – ban-geoengineering Dec 30 '13 at 22:14
You should add a different question since it's a different answer, but you can use this same code but only the query2 parts, modifying the ->posts and ->post_count parts of the $wp_query object to have the sum of the original query that pre_get_posts gives you and the second query you want to append. – guidod Jan 3 '14 at 15:32
How can I remove duplicates from this merged array? – roshan Nov 5 '15 at 8:02
Thanks for this. Had a problematic meta_query using an OR relation. Split it up using this technique and went from 41s to 0.01s. – Craig Harshbarger May 8 at 21:48

I generally merge their ID arrays and make a third query. To keep first set of queries cheap I only return their ID's using fields parameter like this:

//setup your queries with extra parameter fields => ids
$query1 = new WP_Query(array('fields' => 'ids','other_parameters' => 'etc'));
$query2 = new WP_Query(array('fields' => 'ids','other_parameters'=>'etc'));

//now you got post IDs in $query->posts
$allTheIDs = array_merge($query1->posts,$query2->posts);

//new query, using post__in parameter
$finalQuery = new WP_Query(array('post__in' => $allTheIDs));

Hope this helps

share|improve this answer

So, if you have this:

$number1 = new WP_Query($multisitequery);

$number2 = new WP_Query($normalquery);

I assume you define these somewhere previous?

$multisitequery = array();
$normalquery = array();

...in which case, to merge the two queries, just array_merge() the two arrays before passing them to new WP_Query():

$merged_query_args = array_merge( $normalquery, $multisitequery );

$merged_query = new WP_Query( $merged_query_args );

Note that order is important in the array_merge() call. If both have the same array key, the second array will overwrite the first array.

share|improve this answer
Thank you for replying Chip, much appreciated. I have edited my original question to give you a better idea of what i have to work with. Many thanks indeed and i look forward to another knowledge packed reply lol Thanks – Rory Rothon Jun 17 '12 at 22:17

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