More strict

claudiu-cristea · claudiu-cristea · commit be2ad51e1103 · 2026-03-30T16:15:07.000+03:00
diff --git a/src/HTML5/Parser/Tokenizer.php b/src/HTML5/Parser/Tokenizer.php
@@ -1208,7 +1208,7 @@ protected function decodeCharacterReference($inAttribute = false)
      */
     protected function is_alpha($input)
     {
-        if (empty($input)) {
+        if (!is_string($input) || 1 !== strlen($input)) {
             return false;
         }
 

Original file line number	Diff line number	Diff line change
`@@ -1208,7 +1208,7 @@ protected function decodeCharacterReference($inAttribute = false)`
`1208`	`1208`	`*/`
`1209`	`1209`	`protected function is_alpha($input)`
`1210`	`1210`	`{`
`1211`		`- if (empty($input)) {`
	`1211`	`+ if (!is_string($input) \|\| 1 !== strlen($input)) {`
`1212`	`1212`	`return false;`
`1213`	`1213`	`}`
`1214`	`1214`