Function to obtain subclass_id collection_PHP tutorial

function get_bottom_class_id($class_id){
	if(!isset($class_id) || !is_numeric($class_id)){
		return false;
	}
	global $db;
	static $class_id_array=array();
	$sql="select `class_id` from `".TB_PREFIX."web_class` where `class_parent_id`='".$class_id."'";
	$rows=$db->getRowsArray($sql,MYSQL_NUM);
	if(!empty($rows) && is_array($rows)){
		foreach($rows as $row){
			get_bottom_class_id($row[0]);
		}
	}else{
		$class_id_array[]=$class_id;
	}
	if(is_array($class_id_array)){
		$class_id=implode(',',$class_id_array);
	}else{
		$class_id=$class_id_array;
	}
	return $class_id;
}

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http://www.bkjia.com/PHPjc/764198.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/764198.htmlTechArticlefunction get_bottom_class_id($class_id){if(!isset($class_id) || !is_numeric($class_id)) {return false;}global $db;static $class_id_array=array();$sql="select `class_id` from `".TB_P...