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 |
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24 | class FormatNegotiator extends BaseNegotiator |
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25 | { |
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26 | private $map = []; |
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27 | private $requestStack; |
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28 | |||
29 | 20 | public function __construct(RequestStack $requestStack, array $mimeTypes = array()) |
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34 | |||
35 | /** |
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36 | * @param RequestMatcherInterface $requestMatcher |
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37 | * @param array $options |
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38 | */ |
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39 | 19 | public function add(RequestMatcherInterface $requestMatcher, array $options = []) |
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43 | |||
44 | /** |
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45 | * {@inheritdoc} |
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46 | * The best format is also determined in function of the bundle configuration. |
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47 | * |
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48 | * @throws StopFormatListenerException |
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49 | */ |
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50 | 17 | public function getBest($header, array $priorities = []) |
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108 | |||
109 | /** |
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110 | * @param array $values |
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111 | * |
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112 | * @return array |
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113 | */ |
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114 | private function sanitize(array $values) |
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120 | |||
121 | /** |
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122 | * Transform the format (json, html, ...) to their mimeType form (application/json, text/html, ...). |
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123 | * |
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124 | * @param Request $request |
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125 | * @param string[] $priorities |
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126 | * |
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127 | * @return string[] formatted priorities |
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128 | */ |
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129 | 12 | private function normalizePriorities(Request $request, array $priorities) |
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130 | { |
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131 | 12 | $priorities = $this->sanitize($priorities); |
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132 | |||
133 | 12 | $mimeTypes = array(); |
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134 | 12 | foreach ($priorities as $priority) { |
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135 | 12 | if (strpos($priority, '/')) { |
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136 | 2 | $mimeTypes[] = $priority; |
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137 | 2 | continue; |
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138 | } |
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139 | |||
140 | 11 | if (method_exists(Request::class, 'getMimeTypes')) { |
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141 | 11 | $mimeTypes = array_merge($mimeTypes, Request::getMimeTypes($priority)); |
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142 | 11 | } elseif (null !== $request->getMimeType($priority)) { |
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143 | $class = new \ReflectionClass(Request::class); |
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144 | $properties = $class->getStaticProperties(); |
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145 | $mimeTypes = array_merge($mimeTypes, $properties['formats'][$priority]); |
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146 | } |
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147 | |||
148 | 11 | if (isset($this->mimeTypes[$priority])) { |
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149 | 3 | foreach ($this->mimeTypes[$priority] as $mimeType) { |
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150 | 3 | $mimeTypes[] = $mimeType; |
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151 | 3 | } |
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152 | 3 | } |
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153 | 12 | } |
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154 | |||
155 | 12 | return $mimeTypes; |
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156 | } |
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157 | |||
158 | /** |
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159 | * @throws \RuntimeException |
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160 | * |
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161 | * @return Request |
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162 | */ |
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163 | 17 | View Code Duplication | private function getRequest() |
172 | } |
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173 |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: