这里用MB，KB或者GB的格式返回计算结果。
function CalcFullDatabaseSize($database, $db) { $tables = mysql_list_tables($database, $db); if (!$tables) { return -1; } $table_count = mysql_num_rows($tables); $size = 0; for ($i=0; $i < $table_count; $i++) { $tname = mysql_tablename($tables, $i); $r = mysql_query("SHOW TABLE STATUS FROM ".$database." LIKE '".$tname."'"); $data = mysql_fetch_array($r); $size += ($data['Index_length'] + $data['Data_length']); }; $units = array(' B', ' KB', ' MB', ' GB', ' TB'); for ($i = 0; $size > 1024; $i++) { $size /= 1024; } return round($size, 2).$units[$i]; } /* ** Example: */ // open mysql connection: $handle = mysql_connect('localhost', 'user', 'password'); if (!$handle) { die('Connection failed!'); } // get the size of all tables in this database: print CalcFullDatabaseSize('customer1234', $handle); // --> returns something like: 484.2 KB // close connection: mysql_close($handle);