The php function array_merge is used to merge a congener array with of

$arr1 = $dblink->mem_fetch_array ( "SELECT t_pid,imgname,invented,score FROM `t_sum_giftimg` where t_pid=3 or t_pid=6", 0 );  
$arr2 = $dblink->mem_fetch_array ( "SELECT t_pid,imgname,invented,score FROM `t_sum_giftimg` where t_pid=10 or t_pid=12", 0 );  
$imgInfo = array_merge ( $arr1, $arr2 );  
if ($imgInfo) {  
   foreach ( $imgInfo as $imgInfo ) {  
       $imgs [] = $imgInfo;  
   }  
}