"; session_destroy(); } } function checkusername($username) { $sql2 = "select uid from user_list where username='" . mysql_escape_string($username) . "'"; $result = mysql_query($sql2) or die('ERROR: ' . mysql_error()); if (mysql_num_rows($result) > 0) { echo "该用户名已经存在,请更换!"; exit(); } else { echo ""; } } ?> 用户名: 密 码: 职 位: 1 2 验证码:
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