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<?php |
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/** |
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* This file is part of Fabrica. |
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* |
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* (c) Alexandre Salomé <[email protected]> |
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* (c) Julien DIDIER <[email protected]> |
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* |
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* This source file is subject to the GPL license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Fabrica\Component\Config; |
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/** |
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* ChainConfig is used to group different configs with an order. |
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* |
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* This order is useful because of the reading operation: it stops when a value is found. |
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* |
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* If a config fails, exception will be caught and ignored by chain-config. |
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* |
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* Writing operations are propagated to all sub-configs. |
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* |
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* @author Alexandre Salomé <[email protected]> |
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*/ |
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class ChainConfig extends AbstractConfig |
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{ |
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protected $configs; |
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/** |
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* @param array $configs An array of ConfigInterface objects |
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*/ |
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public function __construct(array $configs) |
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{ |
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if (count($configs) < 2) { |
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throw new \LogicException(sprintf('You don\'t need a chain if you only have %s element(s)', count($configs))); |
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} |
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$this->configs = array(); |
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foreach ($configs as $config) |
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{ |
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if (!$config instanceof ConfigInterface) { |
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throw new \InvalidArgumentException(sprintf('Expected a ConfigInterface to be provided, given a %s', get_class($config))); |
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} |
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$this->configs[] = $config; |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function doGetAll() |
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{ |
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$max = count($this->configs); |
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for ($i = 0; $i < $max; $i++) { |
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// If error occurs on reading, ignore and pass to next |
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try { |
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$current = $this->configs[$i]->all(); |
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} catch (\Exception $e) { |
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continue; |
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} |
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if ($i === 0 && count($current)) { |
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return $current; |
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} elseif (count($current)) { |
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break; |
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} |
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} |
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while ($i > 0 && count($current)) { |
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$i--; |
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try { |
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$this->configs[$i]->setAll($current); |
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} catch (\Exception $e) { |
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continue; |
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} |
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} |
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return $current; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function doSetAll(array $values) |
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{ |
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foreach ($this->configs as $config) { |
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try { |
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$config->setAll($values); |
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} catch (\Exception $e) { |
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continue; |
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} |
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} |
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} |
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} |
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SierraTecnologia /
fabrica
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: