Allow only specific file to run PHP via htaccess

php apache .htaccess

You can not add filename to AddType directive. Only file extensions are allowed. To add php handler to a single file you can use this :

 RewriteEngine on RewriteRule ^thisfile\.php$ - [H=application/x-httpd-php5]

Or <filesMatch>

<filesMatch "^thisfile\.php$">AddType application/x-httpd-php5 .php</filesMatch>

Reference :

Mod-rewrite flags

filesMatch

php apache .htaccess

You should use rewrite rule in htaccess.

 RewriteRule ^example\.php9/?$ exmaple.php

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