Just another programmer's blog

Typically most of the model classes depend on database adapter. First way to get database adapter instance is to request it via service manager every time you need it. Second, and more convenient one, is to let Zend\Di do all the magic for you. To achieve this you need to implement Zend\Db\Adapter\AdapterAwareInterface in your model class. Or write an abstract class that implements this interface and extend it with your model class and Zend\Di will inject database adapter dependency. Note: to make this work you should instantiate model classes via ServiceManager . How to setup a database adapter is explained in Getting Started with Zend Framework 2 . Abstract class example: <?php //module/<YOUR_MODULE>/src/<YOUR_MODULE>/Model/AbstractAdapterAware.php namespace <YOUR_MODULE>\Model; use Zend\Db\Adapter\Adapter; use Zend\Db\Adapter\AdapterAwareInterface; abstract class AbstractAdapterAware implements AdapterAwareInterface { /** * Database instan

There is a lot of solutions over the web on how to return data on AJAX request in your Zend Framework 2 application. But none of them seems to be aware of the "right way" described in Zend Framework 2 manual - http://framework.zend.com/manual/2.0/en/modules/zend.mvc.examples.html#returning-early Implementation example: <?php namespace <YOUR_MODULE>\Controller; use Zend\Mvc\Controller\AbstractActionController; use Zend\Json\Json; class AjaxController extends AbstractActionController { public function testAction() { $data = array( 'result' => true, 'data' => array() ) return $this->getResponse()->setContent(Json::encode($data)); } }

Sometimes you need to customize Zend Framework navigation menu output. For instance change <ul><li> output to <div><span>. This is impossible with Zend\View\Helper\Navigation\Menu because its HTML output isn't much customizable (only things like class, indent etc.). Such customization is possible with "partial" script, but my solution is to write a view helper that utilizes navigation menu to array dehydration. Helper: <?php //<YOUR_MODULE>/View/Helper/NavigationMenuDehydrate.php namespace <YOUR_MODULE>\View\Helper; use Zend\View\Helper\AbstractHelper; use RecursiveIteratorIterator; class NavigationMenuDehydrate extends AbstractHelper { protected $container; public function __invoke($container = null) { $this->container = $container; return $this; } public function dehydrate() { $array = array(); $iterator = new RecursiveIteratorIterator($this->getVie

YUI compressor is very useful and powerful tool for javascript files compression. Many developers compress their static javascript files but what about files with PHP tags? With something like this: var username = "<?php echo $username; ?>"; or like this function() { var some_code_before; <?php if (Acl::check("finance")) { ?> Ext.addShortcut('finance'); <?php } ?> var some_code_after; } First example will work, but YUI will throw an exception on second. And also this piece of javascript code does not pass validation. Lets wrap PHP tags into comments: function() { var some_code_before; /*<?php if (Acl::check("finance")) { ?>*/ Ext.addShortcut('finance'); /*<?php } ?>*/ var some_code_after; } Now this code is valid. But lets try to feed it to YUI: # yui test.js function(){var b;Ext.addShortcut("finance");var a}; PHP tags are stripped away by YUI and

Good old days of PHP installation exclusively as an Apache module are gone. Most of the modern PHP installations interact with a web server via FastCGI protocol. For instance nginx webserver and php-fpm daemon. This means that certain apache SAPI functions are not available anymore. One of this functions is apache_request_headers() to dump http headers sent by client. From CGI specification rfc3875, section 4.1.18: Meta-variables with names beginning with "HTTP_" contain values read from the client request header fields, if the protocol used is HTTP. The HTTP header field name is converted to upper case, has all occurrences of "-" replaced with "_" and has "HTTP_" prepended to give the meta-variable name. According to the specification above i wrote a piece of the PHP code that dumps all headers sent by client under any PHP SAPI: foreach ($_SERVER as $key => $value) { if (strpos($key, 'HTTP_') === 0) { $chunks = e