I'm running a php socket. I run the program through nohup. Run this program properly through root. But my problem is running the program via the exec () function in php. When I run the command this way the program runs correctly but the program output is not printed in nohup.out.

my command in ssh: nohup php my_path/example.php & #is working

my command in user php: exec('nohup php my_path/example.php >/dev/null 2>&1 &', $output); #not update nohup.out

please guide me...

CodePudding user response：

From PHP docs on exec:

If a program is started with this function, in order for it to continue running in the background, the output of the program must be redirected to a file or another output stream. Failing to do so will cause PHP to hang until the execution of the program ends.

From man nohup:

If standard input is a terminal, redirect it from /dev/null. If standard output is a terminal, append output to 'nohup.out' if possible, '$HOME/nohup.out' otherwise. If standard error is a terminal, redirect it to standard output. To save output to FILE, use 'nohup COMMAND > FILE'.

To satisfy both - redirect manually to nohup.out:

exec('nohup php my_path/example.php >>nohup.out 2>&1 &', $output);