Passing a JSON between PHP and Python
Question
I need to pass data from a PHP page to a Python script and back. I do it with a form that reminds to a page with this PHP code:
<html>
<body>
<h1>Project</h1>
<h2>Results</h2>
</body>
</html>
<?php
$myHotel->name = $_POST["NAME"];
$hotel_data = json_encode($myHotel); ;
$command = escapeshellcmd("/var/www/html/test.py $hotel_data");
$resultAsString = exec($command);
?>
The JSON is sent back from the Python script:
#!/usr/bin/env python
import sys
import json
print(sys.argv[1]);
The problem, is that i send a JSON string like this:
{"name":"Hotel Roma Sud"}
And I receive something like this:
{name:Hotel Roma Sud}
How can I receive a JSON string or manage to have one? I tried with exec(), json_encode, json_decode... Thanks
2 answers
solution1
0 2022-09-23 14:25:16
You need to modify the script calling the command to avoid " getting parsed out by the bash - in order to give Python correct JSON string the argument should look like this - python test.py "{""name"":""Hotel Roma Sud""}" - this way Python receives '{"name":"Hotel Roma Sud"}' for argv[1] which you can parse with json.loads . It's not very clean solution though, so I'd probably save the JSON string to a file from PHP and then load the contents of the file in Python, deleting the file afterwards if necessary.
solution2
0 2022-09-26 16:40:17
I've found an elegant solution, hope it can be useful for anyone:
PHP file:
<p>Test JSON</p>
<?php
$loc = "Roma Sud";
$hotel = array("Name"=>$loc,"Stars"=>"3");
$param = base64_encode(json_encode($hotel));
$result = shell_exec("/var/www/html/test-json/test.py $param");
// echo "<strong>Hotel Name: </strong>";
$obj = json_decode($result);
print "<strong>Hotel Name: </strong>" . $obj->Name . "<br/>";
print "<strong>Stars: </strong>" . $obj->Stars . "<br/>";
?>
Python file:
#!/usr/bin/env python
import sys
import json
import base64
content = json.loads(base64.b64decode(sys.argv[1]))
print(json.dumps(content))
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