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How to find process id from external command and use it for "Loading"

   
1:27 pm on Feb 13, 2011 (gmt 0)

5+ Year Member



Hello!
I am executing an external command from a PHP script, using the exec function. Since this program can take more than 1-2 minutes to run, I thought I should use a "Loading page...please wait". What I need is to be able to get the process id from the external program that is being run and, when this finishes, I'll start outputting the results.

Is there a way to do this?
1:37 pm on Feb 14, 2011 (gmt 0)

WebmasterWorld Administrator coopster is a WebmasterWorld Top Contributor of All Time 10+ Year Member



Why do you need the process id? Will the second argument to exec() not work? If not, you may also want to review some of your other System program execution [php.net] options.
5:13 pm on Feb 14, 2011 (gmt 0)

WebmasterWorld Senior Member rocknbil is a WebmasterWorld Top Contributor of All Time 10+ Year Member



Your browser may time out in that amount of time, rendering the idea not so reliable . . . current discussion on fork() [webmasterworld.com] to allow it to run as a "background process." Fork will return the PID of the child process.