（转）如何监控脚本运行状态

原文地址：http://stackoverflow.com/questions/45953/php-execute-a-background-process#45966

 

Assuming this is running on a Linux machine, I've always handled it like this:

 

 

exec(sprintf("%s > %s 2>&1 & echo $! >> %s", $cmd, $outputfile, $pidfile));

 This launches the command $cmd, redirects the command output to $outputfile, and writes the process id to $pidfile.

 

That lets you easily monitor what the process is doing and if it's still running.

function isRunning($pid){
    try{
        $result = shell_exec(sprintf("ps %d", $pid));
        if( count(preg_split("/\n/", $result)) > 2){
            return true;
        }
    }catch(Exception $e){}

    return false;
}