Ok, this seems really weird. When I am running a php script from the command line with
& at the end to run it in the background, it's immediately stopped. I tried it on another server and it worked as expected; the job is running in the background.
#!/usr/bin/php <?php sleep (5);
Output on Server 1
[mk@li89-44 html]# ./test.php &  4938 [mk@li89-44 html]# jobs + Running ./test.php &
Output on Server 2
[mk@dev html]# ./test.php &  4938 [mk@dev html]# jobs + Stopped ./test.php &
On Server 2, I can get it in the background like so:
[mk@dev html]$ ./test.php ctrl + z + Stopped ./test.php [mk@dev html]$ bg + ./test.php & [mk@dev html]$ jobs + Running ./test.php
Also on Server 2, if i do something like
wget "http://fileserver.com/largefile.gz" & it goes into the bg running as expected. Running
nohup ./test.php & on server 2 also works as expected.
Both servers are running centos, different versions, and different versions of php as well. I dunno if that's relevant, or if this can be explained just by the way
bg work on linux.