[Beginner php] how to upload the localhost/php file name? what should I do?

[Beginner php] How does one enter the localhost/php file name to download the file? How can this problem be solved? I started to learn php and watched the php100 video. After configuring apache, I added a. a to the apache htdocs file in the video. php file, and then edit the php file. in the video, enter localhost/. php will show the prompt "how to download the file" after entering the localhost/php file name "for" beginner php? How can this problem be solved?
I started to learn php and watched the php100 video. After configuring apache, I added a. a to the apache htdocs file in the video. php file, and then edit the php file. in the video, enter localhost/. php can display the relevant file information. how can I download the information when I do so?
Please help me. I have a poor foundation ~

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AddType application/x-httpd-php. php. phtml
Change
Addtype application/x-httpd-php. php. phtml

Try

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Php is not parsed !!!
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Discussion

Reference:
AddType application/x-httpd-php. php. phtml
I have added this sentence, but it does not work ~

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As mentioned above, the php module is not successfully installed. Add AddType application/x-httpd-php. php in the conf/httpd. conf file.

The premise is that your php module has been installed on your computer. it is generally normal to configure it strictly according to the tutorial.