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Zend\Config\Processor — Zend Framework 2 2.1.5 documentation

Zend\Config

Zend\Config\Processor¶

Zend\Config\Processor gives you the ability to perform some operations on a Zend\Config\Config object. The Zend\Config\Processor is an interface that defines two methods: process() and processValue(). These operations are provided by the following concrete implementations:

Zend\Config\Processor\Constant: manage PHP constant values;
Zend\Config\Processor\Filter: filter the configuration data using Zend\Filter;
Zend\Config\Processor\Queue: manage a queue of operations to apply to configuration data;
Zend\Config\Processor\Token: find and replace specific tokens;
Zend\Config\Processor\Translator: translate configuration values in other languages using Zend\I18n\Translator;

Below we reported some examples for each type of processor.

Zend\Config\Processor\Constant¶

Using Zend\Config\Processor\Constant

This example illustrates the basic use of Zend\Config\Processor\Constant:

define ('TEST_CONST', 'bar');
// set true to Zend\Config\Config to allow modifications
$config = new Zend\Config\Config(array('foo' => 'TEST_CONST'), true);
$processor = new Zend\Config\Processor\Constant();
echo $config->foo . ',';
$processor->process($config);
echo $config->foo;

This example returns the output: TEST_CONST, bar..

Zend\Config\Processor\Filter¶

Using Zend\Config\Processor\Filter

This example illustrates the basic use of Zend\Config\Processor\Filter:

use Zend\Filter\StringToUpper;
use Zend\Config\Processor\Filter as FilterProcessor;
use Zend\Config\Config;
$config = new Config(array ('foo' => 'bar'), true);
$upper = new StringToUpper();
$upperProcessor = new FilterProcessor($upper);
echo $config->foo . ',';
$upperProcessor->process($config);
echo $config->foo;

This example returns the output: bar,BAR.

Zend\Config\Processor\Queue¶

Using Zend\Config\Processor\Queue

This example illustrates the basic use of Zend\Config\Processor\Queue:

use Zend\Filter\StringToLower;
use Zend\Filter\StringToUpper;
use Zend\Config\Processor\Filter as FilterProcessor;
use Zend\Config\Processor\Queue;
use Zend\Config\Config;
$config = new Config(array ('foo' => 'bar'), true);
$upper = new StringToUpper();
$lower = new StringToLower();
$lowerProcessor = new FilterProcessor($lower);
$upperProcessor = new FilterProcessor($upper);
$queue = new Queue();
$queue->insert($upperProcessor);
$queue->insert($lowerProcessor);
$queue->process($config);
echo $config->foo;

This example returns the output: bar. The filters in the queue are applied with a FIFO logic (First In, First Out).

Zend\Config\Processor\Token¶

Using Zend\Config\Processor\Token

This example illustrates the basic use of Zend\Config\Processor\Token:

// set the Config to true to allow modifications
$config = new Config(array('foo' => 'Value is TOKEN'), true);
$processor = new TokenProcessor();
$processor->addToken('TOKEN', 'bar');
echo $config->foo . ',';
$processor->process($config);
echo $config->foo;

This example returns the output: Value is TOKEN,Value is bar.

Zend\Config\Processor\Translator¶

Using Zend\Config\Processor\Translator

This example illustrates the basic use of Zend\Config\Processor\Translator:

use Zend\Config\Config;
use Zend\Config\Processor\Translator as TranslatorProcessor;
use Zend\I18n\Translator\Translator;
$config = new Config(array('animal' => 'dog'), true);
/*
 * The following mapping would exist for the translation
 * loader you provide to the translator instance
 * $italian = array(
 * 'dog' => 'cane'
 * );
 */
$translator = new Translator();
// ... configure the translator ...
$processor = new TranslatorProcessor($translator);
echo "English: {$config->animal}, ";
$processor->process($config);
echo "Italian: {$config->animal}";