Fixed link, sorry about that, let a domain expire
Merge pull request #449 from philipobenito/patch-1

Fixed link, sorry about that, let a domain expire
* add opcache to bytecode cache list
Merge pull request #452 from maglnet/bytecode-cache

add opcache to bytecode cache list
* add docker information
introduce virtualization section
Merge branch 'gh-pages' of https://github.com/codeguy/php-the-right-way into docker
fixing filenames
Grammar: that -> this
Fixing tabbing (spacing) of PDO connection.

Just so it looks as clean as it should.
Merge pull request #455 from cballou/patch-1

Fixing tabbing (spacing) of PDO connection.
Merge pull request #454 from rhynodesigns/patch-1

Grammar: that -> this
minor text improvements
Fix missing PHP closing tag.
Merge pull request #456 from nakadai/patch-1

Fix missing PHP closing tag.
fixed typo
Adding some more information and a link list to the Docker section
Merge pull request #453 from maglnet/docker

add docker information / introduce virtualisation section
Bettering error description readability

Reordering descriptions of error levels to be consistent with how they are listed above.
Merge pull request #461 from jlaswell/patch-1

Bettering error description readability