使用get_post_meta($post->ID, \'your key\', true); 而不是get_meta();比较如下值

$developing = get_post_meta($post->ID, \'developing\', true);

if ($developing == \'value\') {
  // value is matched
} elseif ($developing == \'value2\') {
  // value 2 is matched
} else {
  // not matched
}