Conditions | 16 |
Paths | 18 |
Total Lines | 56 |
Code Lines | 31 |
Lines | 0 |
Ratio | 0 % |
Changes | 0 |
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
1 | <?php |
||
37 | public static function filter($value, bool $allowNull = false, int $minValue = null, int $maxValue = PHP_INT_MAX) |
||
38 | { |
||
39 | if ($allowNull === true && $value === null) { |
||
40 | return null; |
||
41 | } |
||
42 | |||
43 | $valueInt = null; |
||
|
|||
44 | if (is_int($value)) { |
||
45 | $valueInt = $value; |
||
46 | } elseif (is_string($value)) { |
||
47 | $value = trim($value); |
||
48 | |||
49 | if (strlen($value) === 0) { |
||
50 | throw new Exception('$value string length is zero'); |
||
51 | } |
||
52 | |||
53 | $stringToCheckDigits = $value; |
||
54 | |||
55 | if ($value[0] === '-' || $value[0] === '+') { |
||
56 | $stringToCheckDigits = substr($value, 1); |
||
57 | } |
||
58 | |||
59 | if (!ctype_digit($stringToCheckDigits)) { |
||
60 | throw new Exception( |
||
61 | "{$value} does not contain all digits, optionally prepended by a '+' or '-' and optionally " |
||
62 | . "surrounded by whitespace" |
||
63 | ); |
||
64 | } |
||
65 | |||
66 | $phpIntMin = ~PHP_INT_MAX; |
||
67 | |||
68 | $casted = (int)$value; |
||
69 | |||
70 | if ($casted === PHP_INT_MAX && $value !== (string)PHP_INT_MAX) { |
||
71 | throw new Exception("{$value} was greater than a max int of " . PHP_INT_MAX); |
||
72 | } |
||
73 | |||
74 | if ($casted === $phpIntMin && $value !== (string)$phpIntMin) { |
||
75 | throw new Exception("{$value} was less than a min int of {$phpIntMin}"); |
||
76 | } |
||
77 | |||
78 | $valueInt = $casted; |
||
79 | } else { |
||
80 | throw new Exception('"' . var_export($value, true) . '" $value is not a string'); |
||
81 | } |
||
82 | |||
83 | if ($minValue !== null && $valueInt < $minValue) { |
||
84 | throw new Exception("{$valueInt} is less than {$minValue}"); |
||
85 | } |
||
86 | |||
87 | if ($valueInt > $maxValue) { |
||
88 | throw new Exception("{$valueInt} is greater than {$maxValue}"); |
||
89 | } |
||
90 | |||
91 | return $valueInt; |
||
92 | } |
||
93 | } |
||
94 |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.