python calling command issue

Question

I have a little issue with a python script, the script getdata from some web socket, getting Json value, the result is send to a php script using os.system like that :

os.system('echo \' '+ result +' \' |  php sort.php')

but the result is echoed and not piped to the php script

for debug purpose the php script only do that :

$input = readfile("php://stdin");
$data = json_decode($input, true);
var_dump($data['input']);

any idea where the issue can come from ?

PS : result is a pure json string like this one :

{
    "error_code": 250,
    "user": {
        "id": "1",
        "login": "Talus",
        "password": "",
        "email": "",
        "display_name": ""
    },
    "session": {
        "id": "6",
        "user_owner": "1",
        "token": "3MJ9G53U3292DA4217ECCC201CE06D0B0AB0B5941580BA54",
        "last_activity": "2016-02-16 11:59:02",
        "in_game": "0"
    }
}

Perhaps it would be better to use subprocess ... (as the documentation for os.system suggests) — donkopotamus
– donkopotamus, Commented Feb 16, 2016 at 11:02

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

Try this:

import subprocess

proc = subprocess.Popen(['php', '/path/to/sort.php', result],
    stdout=subprocess.PIPE,
    shell=True,
    stdout=subprocess.PIPE)

script_response = proc.stdout.read()

Update

Here's an alternate solution..

Try this with your python script:

subprocess.call(['php', '-f', '/path/to/sort.php', result])

Then update your PHP script like this:

// Only execute via php-cli
if (php_sapi_name() == 'cli')
{
    if ($argc > 1)
    {
        // We use the index 1, because 0 == sort.php
        $result = json_decode($argv[1]);
        
        print_r($result);
    }
    else
    {
        exit('Invalid request @ '. basename(__FILE__) .':'. __LINE__);
    }
}
else
{
    exit('Invalid request @ '. basename(__FILE__) .':'. __LINE__);
}

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Feb 16, 2016 at 11:05

Latheesan

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4 Comments

Jeremy Talus Over a year ago

the json isn't echoed anymore, but the script seems to be paused, there s no output print by the php script any idea ? (I'm not a python dev I took back the work of a colleague, to continue hs project )

Latheesan Over a year ago

try changing your PHP script to load the json from argument, i.e. $input = isset($argv[0]) ? $argv[0] : '';

Jeremy Talus Over a year ago

nothing change, even a simple echo "test"; in the php won't show up

Jeremy Talus Over a year ago

this subprocess.call(['php', 'sort.php', result]) work like I want

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