diff --git a/src/Tokenizers/PHP.php b/src/Tokenizers/PHP.php
index b5a7f84ada..f85c32125d 100644
--- a/src/Tokenizers/PHP.php
+++ b/src/Tokenizers/PHP.php
@@ -2255,6 +2255,9 @@ protected function tokenize($string)
                 for ($i = ($stackPtr - 1); $i >= 0; $i--) {
                     if (is_array($tokens[$i]) === true) {
                         $tokenType = $tokens[$i][0];
+                    } else if ($tokens[$i] === null) {
+                        // Ignore skipped tokens.
+                        continue;
                     } else {
                         $tokenType = $tokens[$i];
                     }
@@ -2268,7 +2271,7 @@ protected function tokenize($string)
                     }
 
                     if ($prevNonEmpty === null
-                        && @isset(Tokens::$emptyTokens[$tokenType]) === false
+                        && isset(Tokens::$emptyTokens[$tokenType]) === false
                     ) {
                         // Found the previous non-empty token.
                         if ($tokenType === ':' || $tokenType === ',' || $tokenType === T_ATTRIBUTE_END) {
@@ -2287,8 +2290,8 @@ protected function tokenize($string)
 
                     if ($tokenType === T_FUNCTION
                         || $tokenType === T_FN
-                        || @isset(Tokens::$methodPrefixes[$tokenType]) === true
-                        || @isset(Tokens::$scopeModifiers[$tokenType]) === true
+                        || isset(Tokens::$methodPrefixes[$tokenType]) === true
+                        || isset(Tokens::$scopeModifiers[$tokenType]) === true
                         || $tokenType === T_VAR
                         || $tokenType === T_READONLY
                     ) {
@@ -2311,7 +2314,7 @@ protected function tokenize($string)
                         break;
                     }
 
-                    if (@isset(Tokens::$emptyTokens[$tokenType]) === false) {
+                    if (isset(Tokens::$emptyTokens[$tokenType]) === false) {
                         $lastSeenNonEmpty = $tokenType;
                     }
                 }//end for