diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php index 9fc6b36fc52bc..c31a4b7ca33f2 100644 --- a/src/Symfony/Component/HttpKernel/Kernel.php +++ b/src/Symfony/Component/HttpKernel/Kernel.php @@ -778,7 +778,9 @@ private function preBoot(): ContainerInterface $this->startTime = microtime(true); } if ($this->debug && !isset($_ENV['SHELL_VERBOSITY']) && !isset($_SERVER['SHELL_VERBOSITY'])) { - putenv('SHELL_VERBOSITY=3'); + if (\function_exists('putenv')) { + putenv('SHELL_VERBOSITY=3'); + } $_ENV['SHELL_VERBOSITY'] = 3; $_SERVER['SHELL_VERBOSITY'] = 3; }
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