PHP中使用表格显示数据库中的数据

	foreach($db -> query($sql) as $row){
			echo"";
			echo "{$row['student_id']}";
			echo "{$row['student_name']}";
			echo "{$row['student_hobby']}";
			echo "{$row['student_phone']}";
			echo "更改";
			echo "删除";
			echo"";
		}