Directory path-related issues

Directory path issues
Bishe is the root directory that contains a
First-level directory regist. PHP and Control folders, index.php
The second-level directory control folder contains the register. Php
Register. PHP inside Jump statement to index.php
echo "<script>window.location.href= ' index.php ';</script>";
Result the actual path is bishe\control\index.php
What I want is bishe\index.php.
How to modify?
------Solution--------------------
echo "<script>window.location.href=". /index.php ';</script> ';
------Solution--------------------
<script>window.location.href= '/index.php ';</script>
/index.php represents the index.php under the root directory
Or:.. /index.php represents the index.php in the previous level, which is the same effect in your needs
index.php or./index.php represents the index.php in the current directory
Also, the standard path delimiter is/, not \
------Solution--------------------
Figuring out the problem with the relevant path
./Sibling
.. /upper Level

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