Update installation.md

[zaydogan]

I have added the missing extensions Dom and Zip to the list.
I removed Tokenizer from the list, since it is enabled by default since PHP 4.3. The reason is because it is not an extension that you can install, but a compile-time option (that is enabled by default.)

[GrahamCampbell]

👎 Every change here is wrong.

[GrahamCampbell]

The tokenizer IS still required, even if it may be enabled by default. As for the zip and dom extensions, they're simply not required for normal operation.

[zaydogan]

Define normal operation.
You can't install the installer nor create a new laravel project without dom and zip.

[zaydogan]

Tokenizer isn't an extension, but declared as one. Please fix that.

[GrahamCampbell]

It can be considered an extension, and composer treats it as one, because php represents it as one internally.

[zaydogan]

You can reproduce this results by disabling the zip and dom extensions in your php.ini.

$ php -v
PHP 5.6.14 (cli) (built: Oct 19 2015 20:06:59)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
$ laravel new blog
Crafting application...
PHP Fatal error: Class 'ZipArchive' not found in /home/zafer/.composer/vendor/laravel/installer/src/NewCommand.php on line 128
$

after enabling zip

$ laravel new blog
Crafting application...
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Installation request for phpunit/phpunit 4.8.21 -> satisfiable by phpunit/phpunit[4.8.21].
- phpunit/phpunit 4.8.21 requires ext-dom * -> the requested PHP extension dom is missing from your system.

Application ready! Build something amazing.
$

after enabling dom, everything builds fine.

[GrahamCampbell]

You can reproduce this results by disabling the zip and dom extensions in your php.ini.

Install with --no-dev.

[GrahamCampbell]

Yes, the dom extension is needed for development.

[GrahamCampbell]

In terms of zip, it's not a requirement of laravel, just our installer.

[GrahamCampbell]

And, the installer is totally optional. I've never even needed to use it myself.

[GrahamCampbell]

The point is that it's incorrect to say that these extensions are required to run the application in production.

[zaydogan]

I agree. I only followed the Installation from the Documentation page. But you won't succeed with the steps provided as is. Therefore I tried to help by updating the information.