php计算整个mysql数据库的大小

php计算连接的mysql数据库的大小，用MB，KB或者GB的格式返回

1. function CalcFullDatabaseSize($database, $db) {
3. $tables = mysql_list_tables($database, $db);
4. if (!$tables) { return -1; }
6. $table_count = mysql_num_rows($tables);
7. $size = 0;
9. for ($i=0; $i < $table_count; $i++) {
10. $tname = mysql_tablename($tables, $i);
11. $r = mysql_query("SHOW TABLE STATUS FROM ".$database." LIKE '".$tname."'");
12. $data = mysql_fetch_array($r);
13. $size += ($data['Index_length'] + $data['Data_length']);
14. };
16. $units = array(' B', ' KB', ' MB', ' GB', ' TB');
17. for ($i = 0; $size > 1024; $i++) { $size /= 1024; }
18. return round($size, 2).$units[$i];
19. }
22. /*
23. ** Example:
24. */
26. // open mysql connection:
27. $handle = mysql_connect('localhost', 'user', 'password');
29. if (!$handle) { die('Connection failed!'); }
31. // get the size of all tables in this database:
32. print CalcFullDatabaseSize('customer1234', $handle);
33. // --> returns something like: 484.2 KB
35. // close connection:
36. mysql_close($handle);