查看自增id

	$sql="select Auto_increment from information_schema.tables where TABLE_SCHEMA='{$数据库名}' and TABLE_NAME='{$表名}'";

	$result=mysqli_query($con,$sql);
	$row = mysqli_fetch_assoc($result);
	echo $row['Auto_increment'];

查看 行数 数据大小 行均大小 索引大小 多余

	$sql="select TABLE_NAME,data_length,index_length,DATA_FREE,TABLE_ROWS,Auto_increment,Avg_row_length
	from information_schema.tables where TABLE_SCHEMA = '{$数据库名}' group by TABLE_NAME order by data_length desc;";

	echo "<table><tr><td>表名</td><td>自增id</td><td>行数</td><td>数据大小</td><td>行均大小</td><td>索引大小</td><td>多余</td></tr>";
	$result=mysqli_query($con,$sql);
	if($result){
		while($row = mysqli_fetch_assoc($result)) {
			echo "<tr>";
				$row['data_length']=getSize($row['data_length']);
				$row['index_length']=getSize($row['index_length']);
				$row['DATA_FREE']=getSize($row['DATA_FREE']);
				$row['Avg_row_length']=getSize($row['Avg_row_length']);
				echo "<td>{$row['TABLE_NAME']}</td>";
				echo "<td>{$row['Auto_increment']}</td>";
				echo "<td>{$row['TABLE_ROWS']}</td>";
				echo "<td>{$row['data_length']}</td>";
				echo "<td>{$row['Avg_row_length']}</td>";
				echo "<td>{$row['index_length']}</td>";
				echo "<td>{$row['DATA_FREE']}</td>";
			echo "</tr>";
		}
	}
	echo "</table>";