PHP - Simplexml To Get A Json File.

<?php
/**
 * OSM Overpass API with PHP SimpleXML / XPath
 *
 * PHP Version: 5.4 - Can be back-ported to 5.3 by using 5.3 Array-Syntax (not PHP 5.4's square brackets)
 */


//
// 1.) Query an OSM Overpass API Endpoint
//




$query = 'node
  ["addr:postcode"~"RM12"]
  (51.5557914,0.2118915,51.5673083,0.2369398)->.point;
  (
  node
  (around.point:100000)
  ["amenity"~"school"];
  way
  (around.point:100000)
  ["amenity"~"school"];
  );
  out;';
 

 
$context = stream_context_create(['http' => [
    'method'  => 'POST',
    'header' => ['Content-Type: application/x-www-form-urlencoded'],
    'content' => 'data=' . urlencode($query),
]]);


# please do not stress this service, this example is for demonstration purposes only.
$endpoint = 'http://overpass-api.de/api/interpreter';
libxml_set_streams_context($context);
$start = microtime(true);

$result = simplexml_load_file($endpoint);
printf("Query returned %2\$d node(s) and took %1\$.5f seconds.\n\n", microtime(true) - $start, count($result->node));

//
// 2.) Work with the XML Result
//

# get all school nodes with xpath
$xpath = '//node[tag[@k = "amenity" and @v = "school"]]';
$schools = $result->xpath($xpath);
printf("%d School(s) found:\n", count($schools));
foreach ($schools as $index => $school)
{
    # Get the name of the school (if any), again with xpath
    list($name) = $school->xpath('tag[@k = "name"]/@v') + ['(unnamed)'];
    printf("#%02d: ID:%' -10s  [%s,%s]  %s\n", $index, $school['id'], $school['lat'], $school['lon'], $name);
}

?>

list($name) = $school->xpath('tag[@k = "name"]/@v') + ['(unnamed)'];

Hi Everyone,

i need some help how can i save this jsonfile to the webserver? 

my code

       // Load initial values from JSON 'file'
    jsonfile = '[{"lane 1":"1","lane 2":"1","lane 3":"5","lane 4":"2"}]';
    var initialstate = JSON.parse(jsonfile);
    setLaneState("lane1",initialstate[0]['lane 1'])
    setLaneState("lane2",initialstate[0]['lane 2'])
    setLaneState("lane3",initialstate[0]['lane 3'])
    setLaneState("lane4",initialstate[0]['lane 4'])

I actually have two parts to this post.  One which describes just my understanding on how a multipart request should look with a REST API and gives a little context, and the second how to actually implement it using Sympony and api-platform.

Part 1

Looking to simultaneously upload a file, some file meta data, and identifier of the uploading user to a REST API, and will do so using a multipart request.

Based on swagger, looks like the request should look something like the following:

POST /upload HTTP/1.1
Content-Length: 428
Content-Type: multipart/form-data; boundary=abcde12345
--abcde12345
Content-Disposition: form-data; name="id"
Content-Type: text/plain
123e4567-e89b-12d3-a456-426655440000
--abcde12345
Content-Disposition: form-data; name="address"
Content-Type: application/json
{
  "street": "3, Garden St",
  "city": "Hillsbery, UT"
}
--abcde12345
Content-Disposition: form-data; name="profileImage "; filename="image1.png"
Content-Type: application/octet-stream
{…file content…}
--abcde12345--

Background noise... The above example shows three parts which include the text ID, JSON address and octet-stream file.  Doing so doesn't make sense to me and I will probably just have two parts for the meta data JSON.  Note that potentially, I will be removing the user from the JSON payload and including it in some JWT header.  Also, showing resources as links such as /api/users/1 in the request and response JSON is new to me, but I guess makes sense.

Regardless, my meta data JSON will look like:

{
    "projectId": 1234,
    "documentDescription": "bla bla bla",
    "specification": "230903.2.4.D",
    "user": "/api/users/1"
}

and the response will look like:

{
    "projectId": 1234,
    "documentDescription": "bla bla bla",
    "specification": "230903.2.4.D",
    "uploadAt": "2021-01-27 08:41:17",
    "fileName": "pressuresensor.pdf".
    "user": "/api/users/1".
    "file": "/api/uplodaed_files/1234"
}

Am I somewhat going down the right path?

Part 2

Wow, should have looked into Sympony before now!  Entities, validation, the API, etc were a breeze.  Still confused with some of the "magic", but understanding what is under the hood more and more.

As stated initially, I am utilizing api-platform and am looking at api-platform's file-upload.

I guess the first question is whether my POST request with both the file and JSON meta data can be performed in a single request.

Per making-a-request-to-the-media_objects-endpoint:

Your /media_objects endpoint is now ready to receive a POST request with a file. This endpoint accepts standard multipart/form-data-encoded data, but not JSON data.

What?  Am I reading this correct?  Do I first need to make a multipart requests using either a standard HTML form or a XMLHttpRequest which just sends the file, receive the document locator, and then send a second request with the location and my meta data?

If so, I guess I have enough to go forward.  I would rather, however, perform the work in a single request.  My previous mentioned swagger multipart-requests shows both in the same request.  symfonycasts's api-uploads also describes doing so, but not with api-platform.  Is there a way to do so with api-platform?  Does it make sense to use api-platform for all other routes but then make a custom route for document with meta data uploads?  Any recommendations are much appreciated.

Thanks

<form action="">
    <fieldset>
        What color is an apple?
        <label>blue <input type="radio" value="A" name="question-1"></label>
        <label>red <input type="radio" value="B" name="question-1"></label>
        <label>yellow <input type="radio" value="C" name="question-1"></label>
        <label>gray <input type="radio" value="D" name="question-1"></label>
    </fieldset>
    <fieldset>
        What color is a banana?
        <label>yellow <input type="radio" value="A" name="question-2"></label>
        <label>blue <input type="radio" value="B" name="question-2"></label>
        <label>red <input type="radio" value="C" name="question-2"></label>
        <label>gray <input type="radio" value="D" name="question-2"></label>
    </fieldset>
    <fieldset>
        What color is the sky?
        <label>yellow <input type="radio" value="A" name="question-3"></label>
        <label>blue <input type="radio" value="B" name="question-3"></label>
        <label>red <input type="radio" value="C" name="question-3"></label>
        <label>gray <input type="radio" value="D" name="question-3"></label>
    </fieldset>
    <fieldset>
        What color is snow?
        <label>white <input type="radio" value="A" name="question-4"></label>
        <label>blue <input type="radio" value="B" name="question-4"></label>
        <label>red <input type="radio" value="C" name="question-4"></label>
        <label>gray <input type="radio" value="D" name="question-4"></label>
    </fieldset>
  <input type="button" value="Submit" class="submit" id="Submit2">
</form>
 
<script>
$(function(){
 
    // Trap the form submit event
    $('form').submit(function(e){
        e.preventDefault() // Prevent browser refresh
        var answers = $(this).seralize()
 
        // Manually send the data with AJAX
        $.post({
            url: $(this).attr('action'),
            data: answers,
 
            // Stuff to do after we get a response
            success: function(response){
                $('#results').text(response.correct)
            }
        })
    })
})
</script>
 
<?php 
$answer1 = $_POST['A'];
$answer2 = $_POST['A'];
$answer3 = $_POST['C'];
$answer4 = $_POST['D'];
$totalCorrect = 0;
if ($answer1 == "B") { $totalCorrect++; }
if ($answer2 == "A") { $totalCorrect++; }
if ($answer3 == "B") { $totalCorrect++; }
if ($answer4) { $totalCorrect++; }
 
// Send the data back as JSON
die json_encode(array(
    'correct'    => $totalCorrect;
));
?>