These results are based on our legacy PHP analysis, consider migrating to our new PHP analysis engine instead. Learn more
1 | <?php |
||
2 | |||
3 | declare(strict_types=1); |
||
4 | |||
5 | namespace Phpml\Clustering\KMeans; |
||
6 | |||
7 | use ArrayAccess; |
||
8 | |||
9 | class Point implements ArrayAccess |
||
10 | { |
||
11 | /** |
||
12 | * @var int |
||
13 | */ |
||
14 | protected $dimension; |
||
15 | |||
16 | /** |
||
17 | * @var array |
||
18 | */ |
||
19 | protected $coordinates = []; |
||
20 | |||
21 | public function __construct(array $coordinates) |
||
22 | { |
||
23 | $this->dimension = count($coordinates); |
||
24 | $this->coordinates = $coordinates; |
||
25 | } |
||
26 | |||
27 | public function toArray(): array |
||
28 | { |
||
29 | return $this->coordinates; |
||
30 | } |
||
31 | |||
32 | /** |
||
33 | * @return int|mixed |
||
34 | */ |
||
35 | public function getDistanceWith(self $point, bool $precise = true) |
||
36 | { |
||
37 | $distance = 0; |
||
38 | for ($n = 0; $n < $this->dimension; ++$n) { |
||
39 | $difference = $this->coordinates[$n] - $point->coordinates[$n]; |
||
40 | $distance += $difference * $difference; |
||
41 | } |
||
42 | |||
43 | return $precise ? sqrt((float) $distance) : $distance; |
||
44 | } |
||
45 | |||
46 | /** |
||
47 | * @return mixed |
||
48 | */ |
||
49 | public function getClosest(array $points) |
||
50 | { |
||
51 | foreach ($points as $point) { |
||
52 | $distance = $this->getDistanceWith($point, false); |
||
53 | |||
54 | if (!isset($minDistance)) { |
||
55 | $minDistance = $distance; |
||
56 | $minPoint = $point; |
||
57 | continue; |
||
58 | } |
||
59 | |||
60 | if ($distance < $minDistance) { |
||
61 | $minDistance = $distance; |
||
62 | $minPoint = $point; |
||
63 | } |
||
64 | } |
||
65 | |||
66 | return $minPoint; |
||
0 ignored issues
–
show
|
|||
67 | } |
||
68 | |||
69 | public function getCoordinates(): array |
||
70 | { |
||
71 | return $this->coordinates; |
||
72 | } |
||
73 | |||
74 | /** |
||
75 | * @param mixed $offset |
||
76 | */ |
||
77 | public function offsetExists($offset): bool |
||
78 | { |
||
79 | return isset($this->coordinates[$offset]); |
||
80 | } |
||
81 | |||
82 | /** |
||
83 | * @param mixed $offset |
||
84 | * |
||
85 | * @return mixed |
||
86 | */ |
||
87 | public function offsetGet($offset) |
||
88 | { |
||
89 | return $this->coordinates[$offset]; |
||
90 | } |
||
91 | |||
92 | /** |
||
93 | * @param mixed $offset |
||
94 | * @param mixed $value |
||
95 | */ |
||
96 | public function offsetSet($offset, $value): void |
||
97 | { |
||
98 | $this->coordinates[$offset] = $value; |
||
99 | } |
||
100 | |||
101 | /** |
||
102 | * @param mixed $offset |
||
103 | */ |
||
104 | public function offsetUnset($offset): void |
||
105 | { |
||
106 | unset($this->coordinates[$offset]); |
||
107 | } |
||
108 | } |
||
109 |
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: