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Referencing this question:

How to add/save Custom Field in user settings/profile "Checkbox list"

I've been trying to get this working, but am having a few issues. I'm using the following line to query the database:

$tags = get_the_author_meta( 'user_interests', $user_ID );
<?php $query = new WP_Query( array( 'tag__in' => array( $tags) ) ); ?>

and the query returns blank. If I print_r the $tags I get

Array ( [74] => 74 )

and if I replace the $tags with 74 directly I get the current content returned. I'm missing something simple, aren't I? Could anyone point me in the right direction?

thanks!

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Got it - just use this: 

<?php $query = new WP_Query( array( 'tag__in' => $tags ) ); ?>
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  • Just to clarify for others - $tags was already an array in the correct format for the tags__in parameter. Wrapping it in another array "nested" it too deep and WP_Query was unable to understand the argument.
    – TheDeadMedic
    Commented Aug 13, 2015 at 14:50

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