$_POST method not working although $_Get work Fine

Question

<?php
//    include_once '../include/user_functions.php';
    if(isset($_POST['btn'])){
        $data=$_POST['frm'];
//        user_login($data);
        var_dump($_POST['frm']);
    }
?>
<!DOCTYPE html>
<html lang="fa">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="">
    <meta name="author" content="Mosaddek">
    <meta name="keyword" content="FlatLab, Dashboard, Bootstrap, Admin, Template, Theme, Responsive, Fluid, Retina">
    <link rel="shortcut icon" href="img/favicon.html">
    <title>FlatLab - Flat & Responsive Bootstrap Admin Template</title>
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <link href="css/bootstrap-reset.css" rel="stylesheet">
    <link href="assets/font-awesome/css/font-awesome.css" rel="stylesheet" />
    <link href="css/style.css" rel="stylesheet">
    <link href="css/style-responsive.css" rel="stylesheet" />
</head>

  <body class="login-body">

    <div class="container">

      <form class="form-signin" action="" method="post">
        <h2 class="form-signin-heading">login now</h2>
        <div class="login-wrap">
            <input type="text" class="form-control" placeholder="username" name="frm[username]"autofocus>
            <input type="password" class="form-control" name="frm[password]" placeholder="password">
            <label class="checkbox">
                <input type="checkbox" value="remember-me">remember me
                <span class="pull-right"> <a href="#"> forget password?</a></span>
            </label>
            <button class="btn btn-lg btn-login btn-block" value="btn-button" name="btn" >login</button>

        </div>

      </form>

    </div>


  </body>
</html>

When i change form method to get that works fine.
when i use browser network tab headers form data has value
When I change if(isset($_POST['btn'])) to vardump($_POST) it return array(0) { } all the time.
I run php on xampp

upload_max_filesize=130M post_max_size=130M

any additional information needed?

@Martin i changed that to input type="sumbit". it doesnt work for me — movAhed, Apr 27 '18 at 22:11
Also try `if ($_SERVER['REQUEST_METHOD'] == 'POST') { print "posted ok"; }` — Martin, Apr 27 '18 at 22:12
Does [this question](https://stackoverflow.com/questions/14111496/php-post-is-empty?noredirect=1&lq=1) help you? — Martin, Apr 27 '18 at 22:14
MovAhed ok, so the POST data is posted; but your detection of this is at fault. THerefore write: `if ($_SERVER['REQUEST_METHOD'] == 'POST') { var_dump($_POST); }` and see what data your form actually sends `:-)` — Martin, Apr 27 '18 at 22:33
Go to the Network tab of the browser's console, do you see it sending the parameters when you submit the form? — Barmar, Apr 27 '18 at 22:43
Can you turn off your CSP- specifically "upgrade insecure requests" and try again? — Martin, Apr 27 '18 at 22:45
Had a similar issue with making a HTTP POST via Angular it was coming thru with an empty $_POST array but I could read the data with `file_get_contents("php://input")` and then parse it from there... — ivanivan, Apr 27 '18 at 23:26
@ivanivan it works for me too. it can be solved to vardump array? — movAhed, Apr 27 '18 at 23:37
maybe... can you do `$res=file_get_contents("php://input");print($res);` and post the results? — ivanivan, Apr 27 '18 at 23:45

Martin · Answer 1 · 2018-04-28T06:02:45.270

I think your issue is your use of the Content Security Policy Header "Upgrade Insecure Requests" which has a couple of minor bugs when used over plain (insecure) HTTP.

Because your localhost is HTTP this might be interrupting the POST data because the "Upgrade Insecure Requests" header is trying to send to a HTTPS address and so might be blocking (stripping) out the POST data when finding it can't reach .

Please try and disable your "upgrade insecure requests" header (and possibly clear your browser cache) and see if this helps your issue?

It may also depend on the browser used, as CSP is only currently on some browsers.

$_POST method not working although $_Get work Fine

1 Answers1