Question

I’m trying to limit the post meta to specific template.

This code seems to do the trick

$post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'] ;
$template_file = get_post_meta($post_id,'_wp_page_template',TRUE);

but when running a debug I get the Undefined index: post_ID/post error.

Is there an alternative or can you help me fix this?

EDIT:

Wrapped whole code with if (isset($_GET['post'])) and that fixed it for me.

Answer 1

With your ternary to avoid a warning you probably want

$post_id = isset($_GET['post']) ? $_GET['post'] : $_POST['post_ID'] ;

Which will check to see if the value post exists in $_GET['post'] before trying to do this, while not raising a warning.