/**
* URL重定向
* @param string $url 重定向的URL地址
* @param integer $time 重定向的等待时间(秒)
* @param string $msg 重定向前的提示信息
* @return void
*/
function redirect($url, $time=0, $msg='') {
if (empty($msg))
$msg = '系统将在'.$time.'秒之后自动跳转到'.$url.'!';
if (!headers_sent()) {
if (0 === $time) {
header('Location: ' . $url);
} else {
header('refresh:'.$time.';url='.$url);
echo($msg);
}
exit();
} else {
$str = '<meta http-equiv="Refresh" content="'.$time.';URL='.$url.'">';
if ($time != 0)
$str .= $msg;
exit($str);
}
}

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