织梦搜索结果如何调用自定义字段

function table($table, $field, $id) 
{ 
global $dsql; 
$primarys = array(); 
$table = strpos($table, '#@_') === false?(strpos($table, 'dede_') === false?'cn_'.$table:str_replace('dede_','cn_',$table)):$table; 
$dsql -> Execute("me","SHOW COLUMNS FROM `$table`"); 
while ($r = $dsql->GetArray()) 
{ 
if($r['Key'] == 'PRI') $primarys[] = $r['Field']; 
} 
if(!emptyempty($primarys)) 
{ 
$primary = $primarys[0]; 
$result = $dsql -> GetOne("SELECT `$field` FROM `$table` WHERE `$primary`= $id"); 
} 
return isset($result[$field])?$result[$field]:''; 
}