I have an infinite loop in a PHP script that read my gpio (with wiringPI) in this manner
$newstatus = trim(exec("gpio read ".$gpioline[$i]));
and this line in rc.local to start on boot
php /root/CheckGPIO.php &
the issue is that when the script is started automatically on boot $newstatus is an empty string variable instead executing php /root/CheckGPIO.php & from the terminal once i have terminal access, all is working good and i get the gpio value in $newstatus
what can cause the issue?
PS. looking at output exec("whoami") script is ever executed as root
