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- 06.01.2017
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EnvParametersResource.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\HttpKernel\Config;
13
14 use Symfony\Component\Config\Resource\SelfCheckingResourceInterface;
15
16 /**
17 * EnvParametersResource represents resources stored in prefixed environment variables.
18 *
19 * @author Chris Wilkinson <chriswilkinson84@gmail.com>
20 */
21 class EnvParametersResource implements SelfCheckingResourceInterface, \Serializable
22 {
23 /**
24 * @var string
25 */
26 private $prefix;
27
28 /**
29 * @var string
30 */
31 private $variables;
32
33 /**
34 * Constructor.
35 *
36 * @param string $prefix
37 */
38 public function __construct($prefix)
39 {
40 $this->prefix = $prefix;
41 $this->variables = $this->findVariables();
42 }
43
44 /**
45 * {@inheritdoc}
46 */
47 public function __toString()
48 {
49 return serialize($this->getResource());
50 }
51
52 /**
53 * {@inheritdoc}
54 */
55 public function getResource()
56 {
57 return array('prefix' => $this->prefix, 'variables' => $this->variables);
58 }
59
60 /**
61 * {@inheritdoc}
62 */
63 public function isFresh($timestamp)
64 {
65 return $this->findVariables() === $this->variables;
66 }
67
68 public function serialize()
69 {
70 return serialize(array('prefix' => $this->prefix, 'variables' => $this->variables));
71 }
72
73 public function unserialize($serialized)
74 {
75 $unserialized = unserialize($serialized);
76
77 $this->prefix = $unserialized['prefix'];
78 $this->variables = $unserialized['variables'];
79 }
80
81 private function findVariables()
82 {
83 $variables = array();
84
85 foreach ($_SERVER as $key => $value) {
86 if (0 === strpos($key, $this->prefix)) {
87 $variables[$key] = $value;
88 }
89 }
90
91 ksort($variables);
92
93 return $variables;
94 }
95 }
96