Today I needed to put a custom field value into a variable that was being defined outside The Loop in functions.php. I had originally had the following code:
// This code DOES NOT work
$my_variable = get_post_meta($post->ID, 'my_custom_field_value', true);
The solution was the following:
// This code DOES work
$my_variable = get_post_meta(get_the_id(), 'my_custom_field_value', true);
Enjoy!
From Toby’s Blog
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