MySQL批量修改表前缀

error_reporting(0);
$old_pre = 'tdr_'; // 原表前缀
$new_pre = 'db_'; // 新表前缀
// 配置连接
$db = new mysqli('127.0.0.1', 'db_user', 'db_pass', 'db_name');
if ($db->connect_error) die('Connect Error (' . $db->connect_errno . ') ' . $db->connect_error);

$query = $db->query('SHOW TABLES;');
$list = $query->fetch_all();
echo 'table : ', count($list),'<hr>';

$len = strlen($old_pre);
foreach ($list as $val) {
    $new_name = $new_pre.substr($val[0], $len, strlen($val[0])-$len);
    echo "ALTER TABLE {$val[0]} RENAME {$new_name};<br />";
    $db->query("ALTER TABLE {$val[0]} RENAME {$new_name};");
}
echo '<hr>success.';

$db->close();