Is there a filter for get_post_custom()?

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I know there’s a filter get_post_content that I can hook into, but that only seems to work with get_post_meta, I need to filter individual values of get_post_custom() by checking if the metadata key matches like: 

function filter_custom($meta)
{
    foreach($meta as $k => $v)
    {

        if ($k === 'some_key') return $v . 'filtered';

    }
}
add_filter('get_post_custom', 'filter_custom');

Is there a hook for this? if not what would be the best way to accomplish it?

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1 comment

  1. The quickest way to answer this question is to follow the code. See get_post_custom in Codex. Scroll down to Source Code section:

    get_post_custom() is located in wp-includes/post.php

    There we’ll see that get_post_custom calls get_post_meta, which then calls get_metadata, which points us to:

    get_metadata() is located in wp-includes/meta.php

    there we’ll finally see the available filter:

    $check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, $single );

    in this case, post is the $meta_type, so our filter is get_post_metadata

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