A question about the jump in PHP

A question about jumping in PHP
For example, a link "www.abc.com/test.php"
Judging if eregi (' abc ', $_server[' Http_referer ')) | | Strpos ($_server[' http_host '), ' abc ')!==false
Just jump to www.def.com/test.php.

Local testing passed, but on the server will be two URLs repeatedly jump, and then removed Strpos ($_server[' http_host '), ' abc ')!==false normal.
What is the reason?

In addition, the way I use the jump is
echo " ; exit;
Other normal, but the Apple browser seems to still not work. Solving..


There is no better way, I have tried a lot of no effect, such as output header, JavaScript, as if it is related to the browser?


------Solution--------------------
You can share

Header ("location:www.def.com/test.php");


------Solution--------------------
ABC and DEF are just different domain names, and the directories and files are the same
This is the key, the operation is actually the same file.
------Solution--------------------
Do not know is not the same file, puzzle ~ ~ ~

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