<?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'];