https://stackoverflow.com/a/49586592/429523

Windows 10 - Home
Apache 2.4.12

## httpd-xampp.conf

ScriptAlias /php73 "C:/xampp/php73"
<Directory "C:/xampp/php73">
    AllowOverride None
    Options None
    Require all denied
    <Files "php-cgi.exe">
        Require all granted
    </Files>
</Directory>

<Directory "C:\home\testphp73">
    UnsetEnv PHPRC
    <FilesMatch "\.php$">
        SetHandler application/x-httpd-php73
        Action application/x-httpd-php73 "/php73/php-cgi.exe"
    </FilesMatch>
</Directory>

## httpd-vhosts.conf

<VirtualHost *:80>
DocumentRoot "C:/home/testphp73"
ServerName testphp73.test
    <Directory "C:/home/testphp73">
        # AllowOverride All      # Deprecated
        # Order Allow,Deny       # Deprecated
         Allow from all         # Deprecated

        # --New way of doing it
        Require all granted
    </Directory>
</VirtualHost>

## index.php

<?php
phpinfo();