用PHP实现自动跳转

<?
//php自带函数
header("location:  http://www.phpx.com ");
?>
<?
//利用meta
echo "<meta http-equiv='refresh' content='0; url=http://www.phpx.com'>";
?>

<?

//利用javascript语言
echo "<script language='javascript'>";
echo "     location='http://www.phpx.com' ; ";
echo "</script>";
?>