Multiple specific posts using wp_query and post__in array – EXPLAINED

This is a placeholder solution snippet for anyone who encountered the same problem I did.

This DOES NOT work:

function doProduct($allTypes) {
//Where $allTypes is a string "1, 2, 3, 4"

$args = array(
'post_type' => 'product',
'categories'	=> 'misc',
'post_status' =>	'publish',
'post__in' => array($allTypes)
);

...
}

So even though $allTypes is a literal string “1, 2, 3, 4” that would look EXACTLY like what you might have typed into the array yourself, it doesn’t work.

This DOES work:

function doProduct($allTypes) {
//Where $allTypes is a string "1, 2, 3, 4"

$args = array(
'post_type' => 'product',
'categories'	=> 'misc',
'post_status' =>	'publish',
'post__in' => explode(',', $allTypes)
);

...
}

Don’t ask me why. Another reason why WordPress is more like KlugePress…or maybe it’s just screwy PHP.