Access the resources in Apache to download their files directly, what to do with

Access the resources in Apache to download their files directly
The access PHP file will prompt to download its files, for what reason? Http.conf about PHP is configured as follows:

AddType application/x-httpd-php. php
AddType application/x-httpd-php. html
AddType application/x-httpd-php. htm

LoadModule php5_module "D:/php/php5apache2_2.dll"
Phpinidir "D:/php/php.ini"

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------Solution--------------------
Check if the Php5apache2_2.dll file is present under d:/php?

Phpinidir "D:/php/php.ini"
Change into
Phpinidir "d:/php/"

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