php批量更改数据库表前缀

<?php          $database = "databaseName";           //数据库名称          $user = "root";                       //数据库用户名          $pwd = "pwd";                         //数据库密码          $replace ='pre_';                     //替换后的前缀          $seach = 'pre1_';                     //要替换的前缀          $db=mysql_connect("localhost","$user","$pwd") or die("连接数据库失败：".mysql_error());         //连接数据库            $tables = mysql_list_tables("$database");                  while($name = mysql_fetch_array($tables)) {                    $table = str_replace($seach,$replace,$name['0']);                                    mysql_query("rename table $name[0] to $table");          }    ?>  

$table = str_replace($seach,$replace,$name['0']);换成  $table = $replace.$name['0'];