Как перенести значения тегов в доп поля?

$sql = $db->super_query("SELECT id, xfields, tags FROM ".PREFIX."_post WHERE 1", true);
$allowed_fruit = array ("Банан", "Абрикос", "Авокадо" ); //Фрукты, которые переносим
foreach( $sql as $row ) {
	
	$row['tags'] = explode(', ', $row['tags']);
	
	if( !$row['xfields'] ) {
              	$xfields_array = array();
		foreach( $row['tags'] as $val ) {
			
			if( in_array( $val, $allowed_fruit ) ) {
				
				if( isset($xfields_array['fruit']) ) {
					
					if( !preg_match( "#{$val}#i", $xfields_array['fruit'] ) ) $xfields_array['fruit'] .= ', '. $val;
					
				} else $xfields_array['fruit'] = 'fruit|' . $val;
				
			}
			
		}		
		$xfields = implode('||', $xfields_array);
		$db->query( "UPDATE " . PREFIX . "_post SET xfields='{$xfields}' WHERE id = '{$row['id']}'" );
	} else {
		
		$xfields_array = array();
		$xfields_tmp = explode('||', $row['xfields']);
		
		foreach( $xfields_tmp as $val ) {
			$val = explode('|', $val);
			
			$xfields_array[$val[0]] = $val[0] . '|' . $val[1];
			
		}		
		
		foreach( $row['tags'] as $val ) {
			
			if( in_array( $val, $allowed_fruit ) ) {
				
				if( isset($xfields_array['fruit']) ) {
					
					if( !preg_match( "#{$val}#i", $xfields_array['fruit'] ) ) $xfields_array['fruit'] .= ', '. $val;
					
				} else $xfields_array['fruit'] = 'fruit|' . $val;
				
			}
			
		}
		
		$xfields = implode('||', $xfields_array);
		
	}
	$db->query( "UPDATE " . PREFIX . "_post SET xfields='{$xfields}' WHERE id = '{$row['id']}'" );	
}