Factor out a helper for a stricter check that the comment is ONLY {@inheritdoc} (and nothing else).

Author: xjm

src/Standards/Squiz/Sniffs/Commenting/FunctionCommentSniff.php

@@ -48,11 +48,8 @@ protected function processReturn(File $phpcsFile, $stackPtr, $commentStart)
         $return = null;
 
         if ($this->skipIfInheritdoc === true) {
-            for ($i = $commentStart; $i <= $tokens[$commentStart]['comment_closer']; $i++) {
-                $trimmedContent = strtolower(trim($tokens[$i]['content']));
-                if ($trimmedContent === '{@inheritdoc}') {
-                    return;
-                }
+            if ($this->checkInheritdoc($phpcsFile, $stackPtr, $commentStart) === true) {
+                return;
             }
         }
 
@@ -206,11 +203,8 @@ protected function processThrows(File $phpcsFile, $stackPtr, $commentStart)
         $tokens = $phpcsFile->getTokens();
 
         if ($this->skipIfInheritdoc === true) {
-            for ($i = $commentStart; $i <= $tokens[$commentStart]['comment_closer']; $i++) {
-                $trimmedContent = strtolower(trim($tokens[$i]['content']));
-                if ($trimmedContent === '{@inheritdoc}') {
-                    return;
-                }
+            if ($this->checkInheritdoc($phpcsFile, $stackPtr, $commentStart) === true) {
+                return;
             }
         }
 
@@ -290,11 +284,8 @@ protected function processParams(File $phpcsFile, $stackPtr, $commentStart)
         $tokens = $phpcsFile->getTokens();
 
         if ($this->skipIfInheritdoc === true) {
-            for ($i = $commentStart; $i <= $tokens[$commentStart]['comment_closer']; $i++) {
-                $trimmedContent = strtolower(trim($tokens[$i]['content']));
-                if ($trimmedContent === '{@inheritdoc}') {
-                    return;
-                }
+            if ($this->checkInheritdoc($phpcsFile, $stackPtr, $commentStart) === true) {
+                return;
             }
         }
 
@@ -729,4 +720,38 @@ protected function checkSpacingAfterParamName(File $phpcsFile, $param, $maxVar,
     }//end checkSpacingAfterParamName()
 
 
+    /**
+     * Determines whether the whole comment is an inheritdoc comment.
+     *
+     * @param \PHP_CodeSniffer\Files\File $phpcsFile    The file being scanned.
+     * @param int                         $stackPtr     The position of the current token
+     *                                                  in the stack passed in $tokens.
+     * @param int                         $commentStart The position in the stack where the comment started.
+     *
+     * @return void
+     */
+    protected function checkInheritdoc(File $phpcsFile, $stackPtr, $commentStart)
+    {
+        $tokens = $phpcsFile->getTokens();
+
+        $allowedTokens = [
+            T_DOC_COMMENT_OPEN_TAG,
+            T_DOC_COMMENT_WHITESPACE,
+            T_DOC_COMMENT_STAR,
+        ];
+        for ($i = $commentStart; $i <= $tokens[$commentStart]['comment_closer']; $i++) {
+            if (in_array($tokens[$i]['code'], $allowedTokens) === false) {
+                $trimmedContent = strtolower(trim($tokens[$i]['content']));
+
+                if ($trimmedContent === '{@inheritdoc}') {
+                    return true;
+                } else {
+                    return false;
+                }
+            }
+        }
+
+    }//end checkInheritdoc()
+
+
 }//end class