Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
1 | <?php |
||
18 | class ConfiguredClientsStrategy implements DiscoveryStrategy, EventSubscriberInterface |
||
19 | { |
||
20 | /** |
||
21 | * @var HttpClient |
||
22 | */ |
||
23 | private static $client; |
||
24 | |||
25 | /** |
||
26 | * @var HttpAsyncClient |
||
27 | */ |
||
28 | private static $asyncClient; |
||
29 | |||
30 | /** |
||
31 | * @param HttpClient $httpClient |
||
32 | * @param HttpAsyncClient $asyncClient |
||
33 | */ |
||
34 | 17 | public function __construct(HttpClient $httpClient = null, HttpAsyncClient $asyncClient = null) |
|
40 | |||
41 | /** |
||
42 | * {@inheritdoc} |
||
43 | */ |
||
44 | public static function getCandidates($type) |
||
45 | { |
||
46 | if (HttpClient::class === $type && null !== self::$client) { |
||
47 | return [['class' => function () { |
||
48 | return self::$client; |
||
49 | }]]; |
||
50 | } |
||
51 | |||
52 | if (HttpAsyncClient::class === $type && null !== self::$asyncClient) { |
||
53 | return [['class' => function () { |
||
54 | return self::$asyncClient; |
||
55 | }]]; |
||
56 | } |
||
57 | |||
58 | 14 | return []; |
|
59 | } |
||
60 | |||
61 | /** |
||
62 | * Make sure to use our custom strategy. |
||
63 | * |
||
64 | * @param Event $e |
||
65 | */ |
||
66 | public function onEvent(Event $e) |
||
70 | |||
71 | /** |
||
72 | * Whenever these events occur we make sure to add our strategy to the discovery. |
||
73 | * |
||
74 | * {@inheritdoc} |
||
75 | */ |
||
76 | View Code Duplication | public static function getSubscribedEvents() |
|
83 | } |
||
84 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.