PHP exec command is not returning full data from Python script

Question

I am connecting to a server through PHP SSH and then using exec to run a python program on that server.

If I connect to that server through putty and execute the same command through command line, I get result like:

Evaluating....

Connecting....

Retrieving data....

1) Statement 1

2) Statement 2

.

.

.

N) Statement N

Python program is written by somebody else...

When I connect through SSH php, I can execute $ssh->exec("ls") and get the full results as proper as on server command line. But when I try $ssh->exec("python myscript.py -s statement 0 0 0"); I couldn't get the full results but I get a random line as an ouput.

In general, if somebody had experienced the same issue and solved, please let me know.

Thanks

I am sorry I cannot show the output. But consider having 23) statement 23 as an output. But you were supposed to have ouput like in question — user3431704
– user3431704, Commented Oct 13, 2016 at 11:02

mhawke · Accepted Answer · 2016-10-13 11:02:07Z

2

Perhaps it's caused by buffering of the output. Try adding the -u option to your Python command - this forces stdout, stdin and stderr to be unbuffered.

answered Oct 13, 2016 at 11:02

mhawke

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4 Comments

user3431704 Over a year ago

Where in this line? $ssh->exec("python myscript.py -s statement 0 0 0");

user3431704 Over a year ago

One more thing I want to ask is: If I achieve the output by your method, what is the way to proper architecture the output? Like json or xml?

mhawke Over a year ago

Add -u after python: $ssh->exec("python -u myscript.py -s statement 0 0 0")

mhawke Over a year ago

Proper architecture? It's hard to say without any details. Either has its place, but if the code is already written, I'd just use that.

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