Installing suggested composer packages ZF2 (Zend Framework 2) - zend-framework2

Question

when you use the zend skeleton to start your new project and composer to install packages it recommends this:
"doctrine/common": "Doctrine\\Common >=2.1 for annotation features",
"ext-intl": "ext/intl for i18n features",
"pecl-weakref": "Implementation of weak references for Zend\\Stdlib\\CallbackHandler",
"zendframework/zendpdf": "ZendPdf for creating PDF representations of barcodes",
"zendframework/zendservice-recaptcha": "ZendService\\ReCaptcha for rendering ReCaptchas in Zend\\Captcha and/or Zend\\Form"
I could install the zendpdf, zendservice-recaptcha and doctine/common package but not the PECL ones.
I think it's a little sad that zf2 suggest the packages, but leaves users alone with, how to properly configure the composer.json.
I heard composer could also get PECL packages, but couldn't find any documentation on it.
How do I install them?

Answer 1

To install the suggested packages, modify composer.json to include them.
"repositories": [
{
"type": "composer",
"url": "http://packages.zendframework.com/"
}
],
"require": {
"php": ">=5.3.3",
"zendframework/zendframework": "2.*",
"doctrine/common": "dev-master",
"zendframework/zendpdf": "2.*",
"zendframework/zendservice-recaptcha": "2.*"
}
Then run
php composer.phar update
Note: that composer installs doctrine/common by using
git clone http://github.com/doctrine/common
On Windows git needs to be in your PATH environment variable.
Regarding ext/intl, this extension is bundled with PHP as of PHP version 5.3.0. and can be found in the ext/ folder of your php installation.[1]
To enable, uncomment (remove the semi-colon before the directive) it in php.ini
extension=php_intl.dll
Regarding pecl-weakref, this is also a PHP extension however this is not bundled with php and needs to be installed. More information on how to do that can be found at http://php.net/manual/en/install.pecl.php
A DLL for this PECL extension is currently unavailable. See also the
building on Windows section. [4]
[1] http://php.net/manual/en/intl.requirements.php
[2] http://php.net/manual/en/weakref.installation.php
[3] http://php.net/manual/en/install.pecl.intro.php
[4] http://php.net/manual/en/install.pecl.windows.php