How to make WP_Query 'post__in' accept an array?

Question

I have a function that returns a comma separated list of post ids that a particular user can access. I want to use this list in a WP_Query loop.

The custom function:

$array = user_albums();
foreach( $array as $post ) {
    if( !in_array( $post->ID, $array ) )
        $ids[] = $post->ID;
}
$access_ids = implode( ', ', $ids );

So here is the situation:

On my test site the id list is 158, 162, 145, 269.
Inserting the list of ids returns only the first post. 'post__in'=> array( $access_ids ),
Inserting the list of ids not in an array returns an error. 'post__in'=> $access_ids ,
Inserting the post ids manually returns correct posts 'post__in'=> array( 158, 162, 145, 269 ),

What could I be doing wrong?
I appreciate any help.

Thanks guys for the input! The implode array was indeed causing the issue. — MTT
– MTT, Commented Feb 6, 2012 at 20:34

Rob Vermeer · Accepted Answer · 2012-02-06 19:37:44Z

11

$access_ids is a string. post__in accepts an array.

So instead of $access_ids you could use 'post__in'=> $ids skipping the $access_ids = implode( ', ', $ids ); all together.

answered Feb 6, 2012 at 19:37

Rob Vermeer

5,1862 gold badges29 silver badges21 bronze badges

for me this also not work can you please help me?

Niket Joshi
– Niket Joshi

2019-01-02 10:37:47 +00:00
Commented Jan 2, 2019 at 10:37

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Rarst · Accepted Answer · 2012-02-06 19:38:07Z

7

That implode() is probably what breaks things:

$access_ids = '158, 162, 145, 269';

$array = array($access_ids); //wrong
var_dump( $array ); 
// array
//  0 => string '158, 162, 145, 269' (length=18)

$array = array_map( 'trim', explode( ',', $access_ids ) ); // right
var_dump( $array ); 
//array
//  0 => string '158' (length=3)
//  1 => string '162' (length=3)
//  2 => string '145' (length=3)
//  3 => string '269' (length=3)

answered Feb 6, 2012 at 19:38

Rarst

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Add a comment |

Stephen Harris · Accepted Answer · 2012-02-06 19:39:16Z

3

Just set 'post__in'=>$ids, declaring array( $access_ids ) doesn't create the desired array.

answered Feb 6, 2012 at 19:39

Stephen Harris

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