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 |
||
7 | class InputParam implements ParamInterface |
||
8 | { |
||
9 | const TYPE_POST = 'POST'; |
||
10 | const TYPE_GET = 'GET'; |
||
11 | const TYPE_PUT = 'PUT'; |
||
12 | const TYPE_FILE = 'FILE'; |
||
13 | const TYPE_COOKIE = 'COOKIE'; |
||
14 | const TYPE_POST_RAW = 'POST_RAW'; |
||
15 | |||
16 | const OPTIONAL = false; |
||
17 | const REQUIRED = true; |
||
18 | |||
19 | /** |
||
20 | * @var string |
||
21 | */ |
||
22 | private $type; |
||
23 | |||
24 | /** |
||
25 | * @var string |
||
26 | */ |
||
27 | private $key; |
||
28 | |||
29 | /** |
||
30 | * @var bool |
||
31 | */ |
||
32 | private $required; |
||
33 | |||
34 | /** |
||
35 | * @var array|null |
||
36 | */ |
||
37 | private $availableValues; |
||
38 | |||
39 | /** |
||
40 | * @var bool |
||
41 | */ |
||
42 | private $multi; |
||
43 | |||
44 | 48 | public function __construct($type, $key, $required = self::OPTIONAL, $availableValues = null, $multi = false) |
|
52 | |||
53 | /** |
||
54 | * @return string |
||
55 | */ |
||
56 | 9 | public function getType() |
|
60 | |||
61 | /** |
||
62 | * @return string |
||
63 | */ |
||
64 | 21 | public function getKey() |
|
68 | |||
69 | /** |
||
70 | * @return boolean |
||
71 | */ |
||
72 | 6 | public function isRequired() |
|
76 | |||
77 | 6 | public function getAvailableValues() |
|
81 | |||
82 | /** |
||
83 | * @return bool |
||
84 | */ |
||
85 | 21 | public function isMulti() |
|
89 | |||
90 | /** |
||
91 | * Check if actual value from environment is valid |
||
92 | * |
||
93 | * @return bool |
||
94 | * |
||
95 | * @throws Exception if actual InputParam has unsupported type |
||
96 | */ |
||
97 | 18 | public function isValid() |
|
120 | |||
121 | /** |
||
122 | * Process environment variables like POST|GET|etc.. and return actual value |
||
123 | * |
||
124 | * @return mixed |
||
125 | * |
||
126 | * @throws Exception if actual InputParam has unsupported type |
||
127 | */ |
||
128 | 39 | public function getValue() |
|
176 | |||
177 | 3 | private function processMultiFileUploads($files) |
|
187 | } |
||
188 |
Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: