php exec在后台与WAMP在Windows上

Question

with the following code i can call a php script and pass some variables into it

$cmd = 'php -f C:/wamp/www/np/myphpscript.php '.$var1;


exec($cmd); 

this way my called script works, but , i need that process to be in the background , i dont want to wait for the script to finish, is there any way of doing that using wamp on windows ? been doing some reading and some add a & at the end of the command, or a > NUL , now i noticed some of them are for linux , is there such a command for wamp on windows ? if there is please share it

Answer 1

EDIT: Due to the way the exec() command waits for the program to finish executing, it's very difficult to do this with vanilla exec(). I came across these solutions, and this one should work:

$rshell = new COM("WScript.Shell");
$rexec = $rshell->Run("php -f C:/wamp/www/np/myphpscript.php ".$var1, 0, false);

The WScript.Shell->Run command takes 3 arguments: the command (you can optionally add output redirection), window mode (0 = hidden), and wait it should wait to finish. Because the 3rd argument is false, this PHP should return immediately.

Original Solution: As this post suggests, you should try START /B cmd. It is virtually the Linux equivalent of cmd & in that it runs the command asynchronously, in the background, without user interaction or opening a new shell.

Because this will return immediately, PHP won't wait for it to finish, and the exec() command will not receive any output. Instead, try using shell output redirection. Your PHP given code would look like this:

$cmd = 'start /b "" php -f C:/wamp/www/np/myphpscript.php '.$var1.' >C:/wamp/www/np/output.txt';
exec($cmd);