Calling shell_exec() without waiting for the output PHP

Question

I Want To Call shell_exec() Without Waiting For The Output

I Want to Execute Another php/or bash script on the background without affect the current page I've Tested Those:

'alert' > k& 
> /dev/null &
& disown

And I Tested Many Others That posted here but still same thing

My Php/Bash script will execute a command to another server and it will take a while .

Answer 1

try this: exec('nohup '.$command.' > ' . $outfile . ' 2>&1 & echo $!');