Fatal error: Uncaught Error: Undefined constant 'STDIN' in /home/edmedu/www/edmtw.com/dev.bak/vendor/symfony/process/Tests/PipeStdinInStdoutStdErrStreamSelect.php:17 Stack trace: #0 {main} thrown in /home/edmedu/www/edmtw.com/dev.bak/vendor/symfony/process/Tests/PipeStdinInStdoutStdErrStreamSelect.php on line 17