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I'm using this script to get image filename, stored in a custom meta called background:

$background = get_post_meta( '22', 'background', true );
echo $background;

But it is returning the id of the image, not his filename.

1 Answer 1

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background is not a Core meta field. Since you say that get_post_meta( '22', 'background', true ); returns an image ID, I can only assume that whatever saved that value saved the image ID and not the filename.

You can convert the filename to an URL with wp_get_attachment_url() or get other information including a partial file name with wp_get_attachment_metadata()

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