Q:

php script in background in ubuntu

i have a php script.  i want to run this in background in ubuntu .  i tried using & after the extension .php
php filename.php &

it displays something like  :   "[1] 15996" this.  i dont understand the meaning of this.  please someone help me with this.  what should i do to run a php  script in background. 
and how do i check it.i used "top" command to check the files running.but,i just showed the terminal is running and does not show the exact file which iam running.  pls help me with this too
que: 1) how to run php script in background in ubuntu
     2) how do i check whether it is running or not

A:

this is my question .i found out the answer for my question .so , i want to share with u all. 
the answer is
just type the command
nohup php <filename>.php &

the process will start running and u will find the process number like i found "15996".some number. 
now type "top" in ubuntu terminal .u will find the process running with the same process number u got
thanks all for anwering my question. 
i hope in future this post may help some one
thanks

