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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| 30 | class Compiler extends BaseManager  | 
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| 31 | { | 
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| 32 | /** @var string|false */  | 
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| 33 | private $redirectTemplate;  | 
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| 34 | |||
| 35 | /** @var PageView[] */  | 
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| 36 | private $pageViews;  | 
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| 37 | |||
| 38 | /** @var Folder */  | 
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| 39 | private $folder;  | 
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| 40 | |||
| 41 | /** @var Twig_Environment */  | 
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| 42 | private $twig;  | 
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| 43 | |||
| 44 | 5 | public function __construct()  | 
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| 50 | |||
| 51 | /**  | 
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| 52 | * @param string|false $template  | 
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| 53 | */  | 
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| 54 | public function setRedirectTemplate ($template)  | 
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| 55 |     { | 
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| 56 | $this->redirectTemplate = $template;  | 
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| 57 | }  | 
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| 58 | |||
| 59 | /**  | 
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| 60 | * @param Folder $folder  | 
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| 61 | */  | 
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| 62 | 5 | public function setTargetFolder (Folder $folder)  | 
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| 66 | |||
| 67 | /**  | 
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| 68 | * @param PageView[] $pageViews  | 
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| 69 | */  | 
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| 70 | 5 | public function setPageViews (array $pageViews)  | 
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| 74 | |||
| 75 | ///  | 
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| 76 | // IO Functionality  | 
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| 77 | ///  | 
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| 78 | |||
| 79 | /**  | 
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| 80 | * Compile all of the PageViews registered with the compiler  | 
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| 81 | *  | 
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| 82 | * @since 0.1.0  | 
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| 83 | */  | 
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| 84 | 5 | public function compileAll ()  | 
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| 85 |     { | 
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| 86 | 5 | foreach ($this->pageViews as &$pageView)  | 
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| 87 |         { | 
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| 88 | 5 | $this->compilePageView($pageView);  | 
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| 89 | }  | 
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| 90 | 5 | }  | 
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| 91 | |||
| 92 | /**  | 
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| 93 | * Compile an individual PageView item  | 
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| 94 | *  | 
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| 95 | * This function will take care of determining *how* to treat the PageView and write the compiled output to a the  | 
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| 96 | * respective target file.  | 
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| 97 | *  | 
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| 98 | * @param DynamicPageView|RepeaterPageView|PageView $pageView The PageView that needs to be compiled  | 
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| 99 | * @since 0.1.1  | 
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| 100 | */  | 
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| 101 | 5 | private function compilePageView (&$pageView)  | 
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| 102 |     { | 
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| 103 | 5 | switch ($pageView->getType())  | 
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| 104 |         { | 
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| 105 | 5 | case PageView::STATIC_TYPE:  | 
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| 106 | 5 | $this->compileStaticPageView($pageView);  | 
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| 107 | 5 | $this->compileStandardRedirects($pageView);  | 
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| 108 | 5 | break;  | 
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| 109 | |||
| 110 | case PageView::DYNAMIC_TYPE:  | 
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| 111 | $this->compileDynamicPageViews($pageView);  | 
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| 112 | $this->compileStandardRedirects($pageView);  | 
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| 113 | break;  | 
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| 114 | |||
| 115 | case PageView::REPEATER_TYPE:  | 
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| 116 | $this->compileRepeaterPageViews($pageView);  | 
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| 117 | $this->compileExpandedRedirects($pageView);  | 
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| 118 | break;  | 
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| 119 | }  | 
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| 120 | 5 | }  | 
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| 121 | |||
| 122 | /**  | 
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| 123 | * Write the compiled output for a static PageView  | 
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| 124 | *  | 
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| 125 | * @param PageView $pageView  | 
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| 126 | * @since 0.1.1  | 
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| 127 | */  | 
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| 128 | 5 | private function compileStaticPageView (&$pageView)  | 
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| 129 |     { | 
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| 130 | 5 | $targetFile = $pageView->getTargetFile();  | 
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| 131 | 5 | $output = $this->renderStaticPageView($pageView);  | 
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| 132 | |||
| 133 | 5 |         $this->output->notice("Writing file: {file}", array('file' => $targetFile)); | 
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| 134 | 5 | $this->folder->writeFile($targetFile, $output);  | 
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| 135 | 5 | }  | 
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| 136 | |||
| 137 | /**  | 
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| 138 | * Write the compiled output for a dynamic PageView  | 
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| 139 | *  | 
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| 140 | * @param DynamicPageView $pageView  | 
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| 141 | * @since 0.1.1  | 
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| 142 | */  | 
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| 143 | View Code Duplication | private function compileDynamicPageViews (&$pageView)  | 
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| 157 | |||
| 158 | /**  | 
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| 159 | * Write the compiled output for a repeater PageView  | 
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| 160 | *  | 
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| 161 | * @param RepeaterPageView $pageView  | 
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| 162 | * @since 0.1.1  | 
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| 163 | */  | 
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| 164 | View Code Duplication | private function compileRepeaterPageViews (&$pageView)  | 
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| 181 | |||
| 182 | ///  | 
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| 183 | // Redirect handling  | 
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| 184 | ///  | 
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| 185 | |||
| 186 | /**  | 
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| 187 | * Write redirects for standard redirects  | 
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| 188 | *  | 
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| 189 | * @param PageView $pageView  | 
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| 190 | * @since 0.1.1  | 
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| 191 | */  | 
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| 192 | 5 | private function compileStandardRedirects (&$pageView)  | 
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| 193 |     { | 
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| 194 | 5 | $redirects = $pageView->getRedirects();  | 
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| 195 | |||
| 196 | 5 | foreach ($redirects as $redirect)  | 
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| 197 |         { | 
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| 198 | $redirectPageView = PageView::createRedirect(  | 
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| 199 | $redirect,  | 
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| 200 | $pageView->getPermalink(),  | 
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| 201 | $this->redirectTemplate  | 
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| 202 | );  | 
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| 203 | |||
| 204 | $this->compilePageView($redirectPageView);  | 
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| 205 | }  | 
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| 206 | 5 | }  | 
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| 207 | |||
| 208 | /**  | 
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| 209 | * Write redirects for expanded redirects  | 
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| 210 | *  | 
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| 211 | * @param RepeaterPageView $pageView  | 
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| 212 | * @since 0.1.1  | 
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| 213 | */  | 
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| 214 | private function compileExpandedRedirects (&$pageView)  | 
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| 236 | |||
| 237 | ///  | 
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| 238 | // Twig Functionality  | 
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| 239 | ///  | 
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| 240 | |||
| 241 | /**  | 
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| 242 | * Get the compiled HTML for a specific iteration of a repeater PageView  | 
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| 243 | *  | 
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| 244 | * @param Twig_Template $template  | 
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| 245 | * @param PageView $pageView  | 
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| 246 | * @param ExpandedValue $expandedValue  | 
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| 247 | *  | 
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| 248 | * @since 0.1.1  | 
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| 249 | * @return string  | 
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| 250 | */  | 
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| 251 | private function renderRepeaterPageView (&$template, &$pageView, &$expandedValue)  | 
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| 265 | |||
| 266 | /**  | 
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| 267 | * Get the compiled HTML for a specific ContentItem  | 
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| 268 | *  | 
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| 269 | * @param Twig_Template $template  | 
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| 270 | * @param PageView $pageView  | 
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| 271 | * @param ContentItem $contentItem  | 
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| 272 | *  | 
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| 273 | * @since 0.1.1  | 
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| 274 | * @return string  | 
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| 275 | */  | 
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| 276 | private function renderDynamicPageView (&$template, &$pageView, &$contentItem)  | 
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| 285 | |||
| 286 | /**  | 
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| 287 | * Get the compiled HTML for a static PageView  | 
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| 288 | *  | 
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| 289 | * @param PageView $pageView  | 
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| 290 | *  | 
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| 291 | * @since 0.1.1  | 
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| 292 | * @return string  | 
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| 293 | *  | 
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| 294 | * @throws \Exception  | 
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| 295 | * @throws \Throwable  | 
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| 296 | * @throws Twig_Error_Syntax  | 
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| 297 | */  | 
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| 298 | 5 | private function renderStaticPageView (&$pageView)  | 
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| 308 | |||
| 309 | /**  | 
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| 310 | * Create a Twig template that just needs an array to render  | 
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| 311 | *  | 
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| 312 | * @param PageView $pageView The PageView whose body will be used for Twig compilation  | 
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| 313 | * @since 0.1.1  | 
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| 314 | *  | 
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| 315 | * @return Twig_Template  | 
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| 316 | *  | 
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| 317 | * @throws \Exception  | 
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| 318 | * @throws \Throwable  | 
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| 319 | * @throws Twig_Error_Syntax  | 
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| 320 | */  | 
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| 321 | 5 | private function createTwigTemplate (&$pageView)  | 
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| 339 | }  | 
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| 340 | 
This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass.
Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type.