add_post_meta（）不起作用

Question

Hope you people are doing good today. :)

i used add_post_meta() and update_post_meta() in function but neither add_post_meta() function working nor update_post_meta.

Here is code.

$post_id = $_POST['post_id'];
add_post_meta($post_id, 'counter_meta', 'Dani');
$return = get_post_meta($post_id, 'counter_meta', true );
echo '<pre>';
print_r($return);
exit;

it's return nothing :(

I checked before id is coming in post_id variable.

Any help.?

Answer 1

Use

$post_id = $post->ID;
add_post_meta($post_id, 'counter_meta', 'Dani');
$return = get_post_meta($post_id, 'counter_meta', true );
echo '<pre>';
print_r($return);
exit;