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fetch API method patch in php [duplicate]

I need to make a PATCH request to a PHP application.
How can I get the data from that PATCH request inside that application?
If I had to do it with a POST, it would just be a simple access to the global $_POST variable.

I know that this has been solved, but for anyone who was hoping for an answer like
$_PATCH["name"];
there is a way to do that:
parse_str(file_get_contents('php://input'), $_PATCH);
then you can access it like $_GET["something"] and $_POST["something"] just do
$_PATCH["something"]
hope that helped someone :)

You can get data with php://input stream wrapper:
$data = file_get_contents('php://input');
Also make sure your web server supports PATCH requests, some are configured to respond only to GET and POST.

Since none of the above has worked for me in PHP 5.6, here's a solution that actually did.
I used this parse_raw_http_request($data) function by Christof.
And here's the code:
$_PATCH = [];
parse_str(file_get_contents('php://input'), $_PATCH);
parse_raw_http_request($_PATCH);
// From now on, the $_PATCH variable keeps all request arguments as well,
// and they're accessible under approprate keys like $_PATCH['yourKey']

i'm using : PHP 7.4
function patchMethod(){
parse_str(file_get_contents('php://input'), $_PATCH);
$body=[];
if (is_array($_PATCH)) {
foreach ($_PATCH as $key => $value) {
$body[$key] = $value;
}
}
return $body;
}

You have $_REQUEST superglobal containing all data we can get regardless the HTTP method used (GET, POST, PATCH, PUT)

Communicate php and js

I'm trying to create a js that send data to a php.
My first problem is that I get get back a html code if I insert this to the php.
This is only for understand the idea. So the js should send the "param" to the php and the php should return the result6 variable in this case, but I get a html code...
$('#f_field').change (function()
{
var param = 28;
$.post('check_mutet.php', param, function(result6) {
alert(result6);
});
});
while check_mutet.php contains this
<?php
$result6=666;
echo $result6;
Thank you for your help, as you can see I'm rather noob :)

param is a plain string (it starts out as a number, but will be converted to a string by the time it gets through to HTTP).
This will be available as STDIN in PHP, which you can read as described in answers to this question.
However, you should encode the data into a structured format that is easier to use.
The traditional format for this is application/x-www-form-urlencoded, which is the default format sent by HTML forms.
If you pass an object to jQuery post, it will encode the data in that format for you:
var param = 28;
var data = { example: param };
$.post('check_mutet.php', data, function(result6) {
Then you can read it through the POST superglobal in PHP:
<?php
$result = $_POST['example'];

JSON stringify and decode JS/PHP

I have a problem with sending an object in PHP. I stringify the object before sending it to the PHP file.
The PHP file then uses json_decode. But the decode shows a blank variable.
The object which i console.log shows this as its structure:
Its then sent to PHP with this :
console.log(my_Obj);
var as = JSON.stringify(my_Obj);
call_data('add.php?&as='+as, nxtFunc);
Now in the PHP file i have this which handles the situation:
$path = json_decode($_GET['as']);
echo $_GET['as'].'<br/>';
print_r($path);
die;
The result is:
[null,null,{\"8\":[null,null,null,null,null,null,[],[],[],[],[]],\"9\":
[null,null,null,null,null,null,null,null,null,null,[]],\"10\":
[null,null,null,null,null,null,null,null,null,null,[],[]],\"11\":
[null,null,null,null,null,null,null,null,null,null,null,[]]}]
<br/>
My XHR request url in Chrome shows:
add.php?as=[null,null,{%228%22:[null,null,null,null,null,null,[],[],[],[],[]],%229%22:[null,null,null,null,null,null,null,null,null,null,[]],%2210%22:[null,null,null,null,null,null,null,null,null,null,[],[]],%2211%22:[null,null,null,null,null,null,null,null,null,null,null,[]]}]
Notice the print_r shows nothing. Should i not be using stringify ?

Thats because my_Obj is an array and not an object.
Try this:
var as = JSON.stringify({data: my_Obj});
Note:
You will also need to clean up the array before stringifying - i.e. clear out all null/undefined indices. Check this answer: https://stackoverflow.com/a/281335/921204

jQuery $.ajax to pass multidimensional array to PHP

I am using jQuery and PHP to write JSON data to my server. I'm processing a decent amount of repeating numeric data (~.75kb), so I want to pass the data to PHP in the form of a multidimensional array.
At the moment I cannot manage to get the data to PHP in a form that it can recognize. I've tried various combinations of sending/receiving as arrays and objects with no success.
The best case scenario would be one in which I pass a the array to the PHP and the PHP converts it to a readable form. I'd rather not use associative arrays or any serializing on the part of the Javascript.
Code... This is giving me a 500 internal server error, which no longer occurs if I omit the passed data variable. (I'm not yet using $data in the php file yet because I know it's not working.)
function generateData() {
// code here
return [ one[ sub_one[], sub_two[] ], two[], three[], four[] /* Etc... */ ]
}
function saveData() {
$.ajax({
url: "scripts/save.php",
data: {
"area":"testing",
"location":"testing",
"name":"testing",
"data":generateData()
}
});
}
<?php
$area = $_GET['area'];
$location = $_GET['location'];
$name = $_GET['name'];
$data = $_GET['data']);
# Performing operations with variables...
echo 1;
?>
Thanks for any help you can offer.

Found a solution:
"data": {
data: generateCellData()
}
The above code passes data as an object to PHP, whereby I can access the original array as $data("data"). I'm still somewhat baffled by why this works when I'm already passing the data and other parameters as an object.

How to read the post request parameters using JavaScript

I am trying to read the post request parameters from my HTML. I can read the get request parameters using the following code in JavaScript.
$wnd.location.search
But it does not work for post request. Can anyone tell me how to read the post request parameter values in my HTML using JavaScript?

POST data is data that is handled server side. And Javascript is on client side. So there is no way you can read a post data using JavaScript.

A little piece of PHP to get the server to populate a JavaScript variable is quick and easy:
var my_javascript_variable = <?php echo json_encode($_POST['my_post'] ?? null) ?>;
Then just access the JavaScript variable in the normal way.
Note there is no guarantee any given data or kind of data will be posted unless you check - all input fields are suggestions, not guarantees.

JavaScript is a client-side scripting language, which means all of the code is executed on the web user's machine. The POST variables, on the other hand, go to the server and reside there. Browsers do not provide those variables to the JavaScript environment, nor should any developer expect them to magically be there.
Since the browser disallows JavaScript from accessing POST data, it's pretty much impossible to read the POST variables without an outside actor like PHP echoing the POST values into a script variable or an extension/addon that captures the POST values in transit. The GET variables are available via a workaround because they're in the URL which can be parsed by the client machine.

Use sessionStorage!
$(function(){
$('form').submit{
document.sessionStorage["form-data"] = $('this').serialize();
document.location.href = 'another-page.html';
}
});
At another-page.html:
var formData = document.sessionStorage["form-data"];
Reference link - https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage

Why not use localStorage or any other way to set the value that you
would like to pass?
That way you have access to it from anywhere!
By anywhere I mean within the given domain/context

If you're working with a Java / REST API, a workaround is easy. In the JSP page you can do the following:
<%
String action = request.getParameter("action");
String postData = request.getParameter("dataInput");
%>
<script>
var doAction = "<% out.print(action); %>";
var postData = "<% out.print(postData); %>";
window.alert(doAction + " " + postData);
</script>

You can read the post request parameter with jQuery-PostCapture(#ssut/jQuery-PostCapture).
PostCapture plugin is consisted of some tricks.
When you are click the submit button, the onsubmit event will be dispatched.
At the time, PostCapture will be serialize form data and save to html5 localStorage(if available) or cookie storage.

I have a simple code to make it:
In your index.php :
<input id="first_post_data" type="hidden" value="<?= $_POST['first_param']; ?>"/>
In your main.js :
let my_first_post_param = $("#first_post_data").val();
So when you will include main.js in index.php (<script type="text/javascript" src="./main.js"></script>) you could get the value of your hidden input which contains your post data.

POST is what browser sends from client(your broswer) to the web server. Post data is send to server via http headers, and it is available only at the server end or in between the path (example: a proxy server) from client (your browser) to web-server. So it cannot be handled from client side scripts like JavaScript. You need to handle it via server side scripts like CGI, PHP, Java etc. If you still need to write in JavaScript you need to have a web-server which understands and executes JavaScript in your server like Node.js

<script>
<?php
if($_POST) { // Check to make sure params have been sent via POST
foreach($_POST as $field => $value) { // Go through each POST param and output as JavaScript variable
$val = json_encode($value); // Escape value
$vars .= "var $field = $val;\n";
}
echo "<script>\n$vars</script>\n";
}
?>
</script>
Or use it to put them in an dictionary that a function could retrieve:
<script>
<?php
if($_POST) {
$vars = array();
foreach($_POST as $field => $value) {
array_push($vars,"$field:".json_encode($value)); // Push to $vars array so we can just implode() it, escape value
}
echo "<script>var post = {".implode(", ",$vars)."}</script>\n"; // Implode array, javascript will interpret as dictionary
}
?>
</script>
Then in JavaScript:
var myText = post['text'];
// Or use a function instead if you want to do stuff to it first
function Post(variable) {
// do stuff to variable before returning...
var thisVar = post[variable];
return thisVar;
}
This is just an example and shouldn't be used for any sensitive data like a password, etc. The POST method exists for a reason; to send data securely to the backend, so that would defeat the purpose.
But if you just need a bunch of non-sensitive form data to go to your next page without /page?blah=value&bleh=value&blahbleh=value in your url, this would make for a cleaner url and your JavaScript can immediately interact with your POST data.

You can 'json_encode' to first encode your post variables via PHP.
Then create a JS object (array) from the JSON encoded post variables.
Then use a JavaScript loop to manipulate those variables... Like - in this example below - to populate an HTML form form:
<script>
<?php $post_vars_json_encode = json_encode($this->input->post()); ?>
// SET POST VALUES OBJECT/ARRAY
var post_value_Arr = <?php echo $post_vars_json_encode; ?>;// creates a JS object with your post variables
console.log(post_value_Arr);
// POPULATE FIELDS BASED ON POST VALUES
for(var key in post_value_Arr){// Loop post variables array
if(document.getElementById(key)){// Field Exists
console.log("found post_value_Arr key form field = "+key);
document.getElementById(key).value = post_value_Arr[key];
}
}
</script>

function getParameterByName(name, url) {
if (!url) url = window.location.href;
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
var formObj = document.getElementById("pageID");
formObj.response_order_id.value = getParameterByName("name");

One option is to set a cookie in PHP.
For example: a cookie named invalid with the value of $invalid expiring in 1 day:
setcookie('invalid', $invalid, time() + 60 * 60 * 24);
Then read it back out in JS (using the JS Cookie plugin):
var invalid = Cookies.get('invalid');
if(invalid !== undefined) {
Cookies.remove('invalid');
}
You can now access the value from the invalid variable in JavaScript.

It depends of what you define as JavaScript. Nowdays we actually have JS at server side programs such as NodeJS. It is exacly the same JavaScript that you code in your browser, exept as a server language.
So you can do something like this: (Code by Casey Chu: https://stackoverflow.com/a/4310087/5698805)
var qs = require('querystring');
function (request, response) {
if (request.method == 'POST') {
var body = '';
request.on('data', function (data) {
body += data;
// Too much POST data, kill the connection!
// 1e6 === 1 * Math.pow(10, 6) === 1 * 1000000 ~~~ 1MB
if (body.length > 1e6)
request.connection.destroy();
});
request.on('end', function () {
var post = qs.parse(body);
// use post['blah'], etc.
});
}
}
And therefrom use post['key'] = newVal; etc...

POST variables are only available to the browser if that same browser sent them in the first place. If another website form submits via POST to another URL, the browser will not see the POST data come in.
SITE A: has a form submit to an external URL (site B) using POST
SITE B: will receive the visitor but with only GET variables

$(function(){
$('form').sumbit{
$('this').serialize();
}
});
In jQuery, the above code would give you the URL string with POST parameters in the URL.
It's not impossible to extract the POST parameters.
To use jQuery, you need to include the jQuery library. Use the following for that:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.1/jquery.min.js" type="text/javascript"></script>

We can collect the form params submitted using POST with using serialize concept.
Try this:
$('form').serialize();
Just enclose it alert, it displays all the parameters including hidden.

<head><script>var xxx = ${params.xxx}</script></head>
Using EL expression ${param.xxx} in <head> to get params from a post method, and make sure the js file is included after <head> so that you can handle a param like 'xxx' directly in your js file.