Question

I have a PHP script which executes a shell command:

$handle = popen('python last', 'r'); $read = fread($handle, 4096); print_r($read); pclose($handle); 

I echo the output of the shell output. When I run this in the command I get something like this:

[root@localhost tester]# python last [last] ZVZX-W3vo9I: Downloading video webpage [last] ZVZX-W3vo9I: Extracting video information [last] ZVZX-W3vo9I: URL: x [download] Destination: here.flv [download]   0.0% of 10.09M at     ---b/s ETA --:-- [download]   0.0% of 10.09M at   22.24k/s ETA 07:44 [download]   0.0% of 10.09M at   66.52k/s ETA 02:35 [download]   0.1% of 10.09M at  154.49k/s ETA 01:06 [download]   0.1% of 10.09M at  162.45k/s ETA 01:03 

However, when I run that same command from PHP I get this output:

[last] ZVZX-W3vo9I: Downloading video webpage [last] ZVZX-W3vo9I: Extracting video information [last] ZVZX-W3vo9I: URL: x [download] Destination: here.flv 

As you can see the bottom bit is missing which is the bit I need!! The problem before was that the percentages were being updated on the same line but now I have changed my Python script so that it creates a new line. But this made difference! 🙁

This question is related to this one.

Thank you for any help.

Update

Needed to redirect output ‘2>&1’. Arul got lucky 😛 since I missed the deadline to pick the one true answer which belonged to Pax!

Answer 1

You read only the first 4,096 bytes from the pipe, you’ll need to place the fread/print_r in a loop and check for the end-of-file using the feof function.

$handle = popen('python last', 'r');  while(!feof($handle)) {     print_r(fread($handle, 4096)); }   pclose($handle);