Cod PHP:
if ($custom_meta['custom_meta_instructions'][0] && $custom_meta['custom_meta_difficulty'][0] &&   $custom_meta['custom_meta_gamefile'][0] ){ 

  $instructions = $custom_meta['custom_meta_instructions'][0]; 
Nu poti pune ceva de genul:
Cod PHP:
if (!isset($custom_meta['custom_meta_instructions'][0])){ 

  $instructions = NULL; 

Nu sunt programator PHP, dar ma gandesc ca poate ar merge ceva de genul.