How to install php7.3-cgi

sudo apt-get update
sudo apt-get install php7.3-cgi -y

sudo cp ~/fastcgi/php72 ~/fastcgi/php73

sudo vim ~/fastcgi/php73
# Set version="7.3"

```
#!/bin/sh
# you can change the PHP version here.
version="7.3"
# php.ini file location, */php-5.2.13/lib equals */php-5.2.13/lib/php.ini.
PHPRC=/etc/php/${version}/cgi/
export PHPRC

PHP_FCGI_CHILDREN=3
export PHP_FCGI_CHILDREN

PHP_FCGI_MAX_REQUESTS=5000
export PHP_FCGI_MAX_REQUESTS

# which php-cgi binary to execute
exec /usr/bin/php-cgi${version}
```


sudo vim /etc/apache2/mods-enabled/fastcgi.conf
```
<IfModule mod_fastcgi.c>
  AddHandler fastcgi-script .fcgi
  AddHandler php-cgi .php
  FastCgiServer /home/dev/fastcgi/php56 -idle-timeout 3600
  FastCgiServer /home/dev/fastcgi/php70 -idle-timeout 3600
  FastCgiServer /home/dev/fastcgi/php71 -idle-timeout 3600
  FastCgiServer /home/dev/fastcgi/php72 -idle-timeout 3600
  FastCgiServer /home/dev/fastcgi/php73 -idle-timeout 3600
  ScriptAlias /cgi-bin/ /home/dev/fastcgi/
</IfModule>
```

sudo chmod 764 /home/dev/fastcgi/php73
sudo chown www-data:dev /home/dev/fastcgi/php73


sudo vim /etc/apache2/sites-available/zeus.conf 
# set new VirtualHost or modify the existing
# Action php-cgi /cgi-bin/php73

sudo apachectl configtest
or 
sudo apachectl -t

# Syntax OK


sudo service apache2 restart