Fatal error: Uncaught Error: Call to undefined function exec() in /home/mypharma/public_html/tests/test_coldstart.php:34 Stack trace: #0 /home/mypharma/public_html/tests/test_coldstart.php(43): sh('rm -rf '/tmp/rx...') #1 {main} thrown in /home/mypharma/public_html/tests/test_coldstart.php on line 34