Execute shell, get and display result realtime using PHP

Question

I need to do some long process using Python which will be called using PHP(my main language) and display the result real time.

Lets say this is my Python script(a.py).

import time

for x in range(10):
    print "S;adasdasd;",x
    time.sleep(0.5)

I have try so many example from internet but always get same result. PHP always wait until script is done then displaying it.

Here is one of so many code i have tried.

    header( 'Content-type: text/html; charset=utf-8' );
    $handle = popen('python folder\\a.py', 'r');
    while (!feof($handle)) {
            echo fgets($handle);
            flush();
            ob_flush();
    }
    pclose($handle);

Did I miss something?

Try adding a character set as a header in your PHP. See here: stackoverflow.com/a/12740522/128161 — user128161
– user128161, Commented Jun 28, 2016 at 8:55
nope.still gives me the same result, did i need to config my PHP or something? — Ryan Arief
– Ryan Arief, Commented Jun 28, 2016 at 9:04
I'm not sure to be honest. It could be something to do with popen rather than using fopen. Is it possible you could alter the code slightly to use fopen and set the URL to a website and just output the contents line by line. If that works then the issue would lie within popen rather than your server config, so may help to narrow down the issue. — user128161
– user128161, Commented Jun 28, 2016 at 9:08

Community · Accepted Answer · 2017-05-23 11:52:53Z

5

PHP always wait until script is done then displaying it.

In this case, it's not PHP's fault; it's because Python fully buffers its standard output if that goes to a pipe. Fortunately, Python has the handy option -u to disable stdout and stderr buffering, so using

    $handle = popen('python -u folder\\a.py', 'r');

solves the problem. See also Disable output buffering.

edited May 23, 2017 at 11:52

CommunityBot

11 silver badge

answered Jul 20, 2016 at 6:15

Armali

19.6k15 gold badges64 silver badges185 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user5740843 Over a year ago

Been looking for a solution for long and this really fixed it. Can't believe it was that simple.

Collectives™ on Stack Overflow

Execute shell, get and display result realtime using PHP

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related