array(), 'new_prefix' => false, ); //suppress error messages due to timing // error_reporting( 0 ); // @ini_set( 'display_errors', 0 ); $check_prefix = true; //Assume the first prefix we generate is unique //generate a new table prefix that doesn't conflict with any other in use in the database while ( $check_prefix ) { $avail = 'abcdefghijklmnopqrstuvwxyz0123456789'; //first character should be alpha $new_prefix = $avail[ mt_rand( 0, 25 ) ]; //length of new prefix $prelength = mt_rand( 4, 9 ); //generate remaning characters for ( $i = 0; $i < $prelength; $i ++ ) { $new_prefix .= $avail[ mt_rand( 0, 35 ) ]; } //complete with underscore $new_prefix .= '_'; $check_prefix = $wpdb->get_results( $wpdb->prepare( 'SHOW TABLES LIKE %s;', $new_prefix . '%' ), ARRAY_N ); //if there are no tables with that prefix in the database set checkPrefix to false } $config_file_path = ITSEC_Lib_Config_File::get_wp_config_file_path(); $config = ITSEC_Lib_File::read( $config_file_path ); if ( is_wp_error( $config ) ) { /* translators: 1: Specific error details */ $response['errors'][] = new WP_Error( $config->get_error_code(), sprintf( __( 'Unable to read the wp-config.php file in order to update the Database Prefix. Error details as follows: %1$s', 'better-wp-security' ), $config->get_error_message() ) ); return $response; } $regex = '/(\$table_prefix\s*=\s*)([\'"]).+?\\2(\s*;)/'; $config = preg_replace( $regex, "\${1}'$new_prefix'\${3}", $config ); $write_result = ITSEC_Lib_File::write( $config_file_path, $config ); if ( is_wp_error( $write_result ) ) { /* translators: 1: Specific error details */ $response['errors'][] = new WP_Error( $write_result->get_error_code(), sprintf( __( 'Unable to update the wp-config.php file in order to update the Database Prefix. Error details as follows: %1$s', 'better-wp-security' ), $config->get_error_message() ) ); return $response; } $response['new_prefix'] = $new_prefix; $tables = $wpdb->get_results( $wpdb->prepare( 'SHOW TABLES LIKE %s', $wpdb->base_prefix . '%' ), ARRAY_N ); //retrieve a list of all tables in the DB //Rename each table foreach ( $tables as $table ) { $table = substr( $table[0], strlen( $wpdb->base_prefix ), strlen( $table[0] ) ); //Get the table name without the old prefix //rename the table and generate an error if there is a problem if ( $wpdb->query( 'RENAME TABLE `' . $wpdb->base_prefix . $table . '` TO `' . $new_prefix . $table . '`;' ) === false ) { $response['errors'][] = new WP_Error( 'itsec-database-prefix-utility-change-database-prefix-failed-table-rename', sprintf( __( 'Could not rename table %1$s. You may have to rename the table manually.', 'better-wp-security' ), $wpdb->base_prefix . $table ) ); } } if ( is_multisite() ) { //multisite requires us to rename each blogs' options $blogs = $wpdb->get_col( "SELECT blog_id FROM `" . $new_prefix . "blogs` WHERE public = '1' AND archived = '0' AND mature = '0' AND spam = '0' ORDER BY blog_id DESC" ); //get list of blog id's if ( is_array( $blogs ) ) { //make sure there are other blogs to update //update each blog's user_roles option foreach ( $blogs as $blog ) { $wpdb->query( 'UPDATE `' . $new_prefix . $blog . '_options` SET option_name = "' . $new_prefix . $blog . '_user_roles" WHERE option_name = "' . $wpdb->base_prefix . $blog . '_user_roles" LIMIT 1;' ); } } } $upOpts = $wpdb->query( 'UPDATE `' . $new_prefix . 'options` SET option_name = "' . $new_prefix . 'user_roles" WHERE option_name = "' . $wpdb->base_prefix . 'user_roles" LIMIT 1;' ); //update options table and set flag to false if there's an error if ( $upOpts === false ) { //set an error $response['errors'][] = new WP_Error( 'itsec-database-prefix-utility-change-database-prefix-failed-options-update', __( 'Could not update prefix references in options table.', 'better-wp-security' ) ); } $rows = $wpdb->get_results( "SELECT * FROM `{$new_prefix}usermeta`" ); //get all rows in usermeta //update all prefixes in usermeta foreach ( $rows as $row ) { if ( substr( $row->meta_key, 0, strlen( $wpdb->base_prefix ) ) == $wpdb->base_prefix ) { $pos = $new_prefix . substr( $row->meta_key, strlen( $wpdb->base_prefix ), strlen( $row->meta_key ) ); $result = $wpdb->query( $wpdb->prepare( "UPDATE `{$new_prefix}usermeta` SET meta_key = %s WHERE meta_key = %s LIMIT 1", $pos, $row->meta_key ) ); if ( $result == false ) { $response['errors'][] = new WP_Error( 'itsec-database-prefix-utility-change-database-prefix-failed-usermeta-update', __( 'Could not update prefix references in usermeta table.', 'better-wp-security' ) ); } } } return $response; } }