Install LAMP on MAC OS High Sierra

####### Apache Installation
sudo apachectl stop
sudo launchctl unload -w /System/Library/LaunchDaemons/org.apache.httpd.plist 2>/dev/null
brew install httpd

#Now we just need to configure things so that our new Apache server is auto-started
sudo brew services start httpd

#You can see Apache running on the browser by default http://localhost:8080

#Useful commands
sudo apachectl start
sudo apachectl stop
sudo apachectl -k restart

#Modifying http.conf in /usr/local/etc/httpd/httpd.conf
cd /usr/local/etc/httpd

sudo vi http.conf

#Listen 8080
Listen 80
...
#DocumentRoot "/usr/local/var/www"
DocumentRoot /Users/your_user/Sites
...
<Directory /Users/your_user/Sites>
...
#AllowOverride None
AllowOverride All
...
#Enable this
LoadModule rewrite_module lib/httpd/modules/mod_rewrite.so
...
#Set the user and group
#User _www
#Group _www
User claudiainbytes
Group staff
...
#ServerName www.example.com:8080
ServerName localhost
...
#Restart Apache
sudo apachectl -k restart

#Pointing your browser to http://localhost should display your new message.

###### PHP Installation

#We will proceed by installing PHP 5.6, PHP 7.0, PHP 7.1 and PHP 7.2 and using a simple script to switch between them as we need.

brew install php56 --with-httpd
brew unlink php56
brew install php70 --with-httpd
brew unlink php70
brew reinstall php71 --with-httpd
brew unlink php71
brew reinstall php72 --with-httpd

#Let's switch back to the first PHP version now:
brew unlink php70
brew link php56

##### Apache PHP Setup - Part 1
LoadModule php5_module        /usr/local/Cellar/php56/5.6.33_9/libexec/apache2/libphp5.so
LoadModule php7_module        /usr/local/Cellar/php70/7.0.27_19/libexec/apache2/libphp7.so

On my system, in /usr/local/etc/httpd/httpd.conf I had to add

AddType application/x-httpd-php .php
<FilesMatch \.php$>`
    SetHandler application/x-httpd-php
</FilesMatch>

It may also be convenient to add index.php here

<IfModule dir_module>
    DirectoryIndex index.php index.html
</IfModule>