diff --git a/src/Symfony/Component/HttpFoundation/HeaderUtils.php b/src/Symfony/Component/HttpFoundation/HeaderUtils.php index f91c7e1d97d86..3456edace0dc1 100644 --- a/src/Symfony/Component/HttpFoundation/HeaderUtils.php +++ b/src/Symfony/Component/HttpFoundation/HeaderUtils.php @@ -256,7 +256,7 @@ public static function parseQuery(string $query, bool $ignoreBrackets = false, s private static function groupParts(array $matches, string $separators, bool $first = true): array { $separator = $separators[0]; - $separators = substr($separators, 1); + $separators = substr($separators, 1) ?: ''; $i = 0; if ('' === $separators && !$first) {
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