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<?
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require_once "./session_init.inc.php";
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require_once "./reg_check.inc.php";
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require_once "./common_lib.inc.php";
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?>
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<?
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if ($_SESSION["BBS_uid"]==0)
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{
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echo ("尚未登陆");
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exit();
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}
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$permit = false;
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if (preg_match("/^[A-Za-z]{3,12}$/",$_SESSION["BBS_username"]))
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{
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error_msg ("您无权修改用户名！", true);
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exit();
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}
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$username=trim($_POST["username"]);
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if (!preg_match("/^[A-Za-z]{5,12}$/",$username))
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{
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error_msg ("用户名填写不正确！", true);
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exit();
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}
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if (!check_str($username))
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{
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error_msg ("用户名含有系统保留词！", true);
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exit();
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}
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$db_conn=include "./db_open.inc.php";
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$rs=mysql_query("select UID from user_list where username='" .
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mysqli_real_escape_string($db_conn, $username) . "' limit 1");
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if (mysql_num_rows($rs)>0)
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{
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error_msg ("用户名已存在！", true);
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exit();
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}
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mysql_free_result($rs);
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mysql_query("update user_list set username='" .
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mysqli_real_escape_string($db_conn, $username) . "'".
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" where UID=".$_SESSION["BBS_uid"])
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or die("Update error!");
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mysql_close($db_conn);
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$_SESSION["BBS_username"] = $username;
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header ("Location: main.php");
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?>
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