Php batch delete tables with the specified prefix in the database take prefix _ as an example. batch delete prefix_PHP tutorial

Php deletes tables with the specified prefix in a database in batches. the prefix _ is used as an example to delete tables with the specified prefix in batches. Php batch deletes tables with the specified prefix in the database. taking prefix _ as an example, how to batch delete tables with the prefix _ in the database using php. For example, if you delete a table with a specified prefix in a database in php batch, use prefix _ as an example to delete the prefix in batches.

How to use php to batch delete all tables prefixed with prefix _ in the database.

For example, delete all tables with the prefix "prefix.

<? Php // Set the database connection information. Database server address, database username, data password mysql_connect ('database host', 'database username ', 'database password '); // Set the queried database name mysql_select_db ('database name'); $ rs = mysql_query ('Show tables '); while ($ arr = mysql_fetch_array ($ rs )) {// Set the database table prefix to be deleted in batches, for example, prefix _ $ TF = strpos ($ arr [0], 'prefix _'); if ($ TF = 0) {$ FT = mysql_query ("drop table $ arr [0]"); if ($ FT) {echo "$ arr [0] deleted successfully!
";}}?>

Operation instance:

Create a new php file and save it as deletedata. php.
For example, if you want to delete the back-end data of www.jb51.net or http://www.bkjia.com/, you can perform the following two steps:

1. Upload the saved deletedata. php file to the root directory of your website;

2. enter www.jb51.net/deletedata.php?http://www.bkjia.com/deletedata.php in the address bar.
The script displays information about the successful deletion of all tables in the browser.

Mysql databases batch delete data tables with the same prefix

Create a delete script first

Run the following statement:
Select 'drop table' + name from sysobjects where type = 'u' and name like 'B %'

The query results are displayed, and the query results are copied.
Then run the copied query results in database 123.

Mysql queries all tables with specific prefixes in a database.

Php won't.

In mysql, I will query the table information.

It is queried from information_schema.tables.

The following is an example:

Mysql> SELECT table_name, table_type, engine
-> FROM information_schema.tables
-> WHERE table_schema = 'test'
-> Order by table_name DESC;
-> //
+ -------------------- + ------------ + -------- +
| Table_name | table_type | engine |
+ -------------------- + ------------ + -------- +
| V_sale_report_x | VIEW | NULL |
| V_sale_report | VIEW | NULL |
| Union_tab_2 | base table | InnoDB |
| Union_tab_1 | base table | InnoDB |
| Test_trigger_table | base table | InnoDB |
| Test_tab2 | base table | InnoDB |
| Test_tab | base table | InnoDB |
| Test_main | base table | InnoDB |
| Test_dysql | base table | InnoDB |
| Test_create_tab4 | base table | InnoDB |
| Test_create_tab2 | base table | InnoDB |
| Test_create_tab1 | base table | InnoDB |
| Test_create_tab | base table | InnoDB |
| Sale_report | base table | InnoDB |
| Log_table | base table | InnoDB |
+ -------------------- + ------------ + -------- +
15 rows in set (0.02 sec)
 

How to use php to batch delete all tables prefixed with prefix _ in the database. For example, delete the prefix "...