php计算整个mysql数据库大小的方法

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);