@@ -85,6 +85,9 @@ public function process(File $phpcsFile, $stackPtr)
8585 $ this ->processObjectCall ($ phpcsFile , $ stackPtr );
8686 }
8787
88+ /**
89+ * Handle static calls such as ZipArchive::extractTo().
90+ */
8891 private function processStaticCall (File $ phpcsFile , int $ stackPtr ): void
8992 {
9093 $ tokens = $ phpcsFile ->getTokens ();
@@ -112,6 +115,9 @@ private function processStaticCall(File $phpcsFile, int $stackPtr): void
112115 $ this ->addExtractWarning ($ phpcsFile , $ methodPtr , $ methodConfig );
113116 }
114117
118+ /**
119+ * Handle chained/object calls such as $zip->extractTo().
120+ */
115121 private function processObjectCall (File $ phpcsFile , int $ stackPtr ): void
116122 {
117123 $ tokens = $ phpcsFile ->getTokens ();
@@ -134,11 +140,17 @@ private function processObjectCall(File $phpcsFile, int $stackPtr): void
134140 }
135141 }
136142
143+ /**
144+ * Emit the configured warning for a matched method.
145+ */
137146 private function addExtractWarning (File $ phpcsFile , int $ methodPtr , array $ methodConfig ): void
138147 {
139148 $ phpcsFile ->addWarning ($ methodConfig ['message ' ], $ methodPtr , $ methodConfig ['code ' ]);
140149 }
141150
151+ /**
152+ * Resolve the fully qualified class name used in a static call.
153+ */
142154 private function getClassName (File $ phpcsFile , int $ stackPtr ): string
143155 {
144156 $ tokens = $ phpcsFile ->getTokens ();
@@ -152,6 +164,9 @@ private function getClassName(File $phpcsFile, int $stackPtr): string
152164 return implode ('' , $ parts );
153165 }
154166
167+ /**
168+ * Map a class (direct or alias) to one of the sniff targets.
169+ */
155170 private function identifyTarget (File $ phpcsFile , string $ className ): ?string
156171 {
157172 $ normalized = ltrim (strtolower ($ className ), '\\' );
@@ -175,6 +190,9 @@ private function identifyTarget(File $phpcsFile, string $className): ?string
175190 return null ;
176191 }
177192
193+ /**
194+ * Fetch method metadata for the requested target method.
195+ */
178196 private function getMethodConfig (array $ targetConfig , string $ methodName ): ?array
179197 {
180198 $ methodName = strtolower ($ methodName );
@@ -186,6 +204,8 @@ private function getMethodConfig(array $targetConfig, string $methodName): ?arra
186204 }
187205
188206 /**
207+ * Return all aliases referencing the given target within the file.
208+ *
189209 * @return array<int, string>
190210 */
191211 private function getTargetAliases (File $ phpcsFile , string $ targetKey ): array
@@ -211,6 +231,8 @@ private function getTargetAliases(File $phpcsFile, string $targetKey): array
211231 }
212232
213233 /**
234+ * Discover variables/properties instantiated from the target class.
235+ *
214236 * @return array{variables: string[], properties: string[]}
215237 */
216238 private function getTargetVariables (File $ phpcsFile , string $ targetKey ): array
@@ -261,6 +283,8 @@ private function getTargetVariables(File $phpcsFile, string $targetKey): array
261283 }
262284
263285 /**
286+ * Build a deduplicated list of class names (FQCN + aliases) for a target.
287+ *
264288 * @return array<int, string>
265289 */
266290 private function buildClassNameAlternatives (File $ phpcsFile , string $ targetKey , string $ fqn ): array
@@ -273,6 +297,9 @@ private function buildClassNameAlternatives(File $phpcsFile, string $targetKey,
273297 return array_values (array_unique ($ names , SORT_STRING ));
274298 }
275299
300+ /**
301+ * Collect import use statements for the current file.
302+ */
276303 private function getImportUseStatements (File $ phpcsFile ): array
277304 {
278305 $ filename = $ phpcsFile ->getFilename ();
@@ -310,6 +337,9 @@ private function getImportUseStatements(File $phpcsFile): array
310337 return $ this ->importsCache [$ filename ] = $ useStatements ;
311338 }
312339
340+ /**
341+ * Determine if the variable/property before the operator is a tracked Zip instance.
342+ */
313343 private function isTargetVariable (File $ phpcsFile , int $ stackPtr , string $ targetKey ): bool
314344 {
315345 $ tokens = $ phpcsFile ->getTokens ();
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