Why is $_POST[''] not working with <form>

This is a Rock Paper Scissors game and I am just starting on it, but it will not display the $_POST['keuzen'].

So I don't get why this is not working. Tried many things but can't find a good solution.

<?php session_start(); ?>
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>RockPaperScissor</title>
    </head>
    <body>
        <form action="RockPaperScissor.php" method="post">
            <input type="image" src="steen.jpg" alt="steen" name="keuzen" value="steen" title="Steen">
            <input type="image" src="papier.jpg" alt="papier" name="keuzen" value="papier" title="Papier">
            <input type="image" src="schaar.jpg" alt="schaar" name="keuzen" value="schaar" title="Schaar">
        </form>
        <?php
            if (isset($_POST['keuzen'])) {
                $keuzen = $_POST['keuzen'];
                $kiezenuit = array("steen", "papier", "schaar");
                $random = rand(0, 2);
                $computer = $kiezenuit[$random];

                echo 'jij koos ' . $keuzen . '<br>';
                echo 'De computer koos ' . $computer . '<br';

                if ($keuzen == $computer) {
                    echo 'Resultaat : Draw ';
                }
            }
        ?>
    </body>
</html>

Assuming the form is in the same RockPaperScissor.php page, better introduce a hidden field that takes the value of a clicked image, but remove the name tag from the images itself:

<?php session_start(); ?>
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>RockPaperScissor</title>
    </head>
    <body>
        <form action="RockPaperScissor.php" method="post">
            <input type="hidden" name="keuzen" value="">
            <input type="image" src="steen.jpg" alt="steen" value="steen" title="Steen" onclick="document.forms[0].keuzen.value=this.value">
            <input type="image" src="papier.jpg" alt="papier" value="papier" title="Papier" onclick="document.forms[0].keuzen.value=this.value">
            <input type="image" src="schaar.jpg" alt="schaar" value="schaar" title="Schaar" onclick="document.forms[0].keuzen.value=this.value">
        </form>
        <?php
            if (!empty($_POST['keuzen'])) {
                $keuzen = $_POST['keuzen'];
                $kiezenuit = array("steen", "papier", "schaar");
                $random = rand(0, 2);
                $computer = $kiezenuit[$random];

                echo 'jij koos ' . $keuzen . '<br>';
                echo 'De computer koos ' . $computer . '<br>';

                if ($keuzen == $computer) {
                    echo 'Resultaat : Draw ';
                }
            }
        ?>
    </body>
</html>

Upon POST, you will get the following:

Array
(
    [keuzen] => schaar
    [x] => 7
    [y] => 3
)

jij koos schaar
De computer koos schaar
Resultaat : Draw

PHP: $_POST, $_POST. $HTTP_POST_VARS [deprecated]. (PHP 4 >= 4.1.0, PHP 5, PHP 7). $_ POST --� PHP $_POST. PHP $_POST is a PHP super global variable which is used to collect form data after submitting an HTML form with method="post". $_POST is also widely used to pass variables. The example below shows a form with an input field and a submit button.

The purpose of <input type="image" name="keuzen"> is to provide a server side image map. It submits the form as a side effect, but the purpose is to select coordinates on the image.

When you click it, x and y coordinates will be sent to the server.

If I remember correctly, you'll get something like keuzen.y=123&keuzen.x=456 which PHP will use to populate $_POST['keuzen_x'] and $_POST['keuzen_y'] but not $_POST['keuzen'].

If you do a var_dump($_POST) you can see the data structure you actually get.

If you want to just have regular submit buttons which look like images, then use regular submit buttons containing images:

<button name="keuzen" value="steen"><img src="steen.jpg" alt="steen"></button>

You can style away the borders and background of the button element with CSS if you like.

PHP $_POST, PHP $_POST. PHP $_POST is a PHP super global variable which is used to collect form data after submitting an HTML form with method="post". The $_POST Variable. The $_POST variable is an array of variable names and values sent by the HTTP POST method. The $_POST variable is used to collect values from a form with method="post". Information sent from a form with the POST method is invisible to others and has no limits on the amount of information to send. Example

Change names of inputs like this: name="keuzen[steen]" and remove value attributes.
Read POSTed value like this: $keuzen = array_keys($_POST['keuzen'])[0];

You can also verify that the POSTed value is not empty.

PHP $_POST, PHP $_POST. PHP $_POST is a PHP super global variable which is used to collect form data after submitting an HTML form with method="post". The problem is that you're checking if $_POST['send'] is set, but it won't be. The "send" field in your form is the button, but the button doesn't have a value, so it won't be included in $_POST. Hope that helps.

$_GET,$_POST, and $_REQUEST, $_GET, $_POST, and $_REQUEST. $_GET Variable. What is it? The $_GET variable is used to get data from a form that is written in HTML. Also in the url� The $_POST variable is also used to collect data from forms, but the $_POST is slightly different because in $_GET it displayed the data in the url and $_POST does not. The data that $_POST gets, is invisible to others and the amount that can be sent is not limited besides the 8MB max size.

What is the purpose of $_POST?, You may want to read up on the basics of PHP. Try reading some starter tutorials. $_POST is a variable used to grab data sent through a web� POST create an array which holds key/value pairs, where keys are the names of the form controls and values are the input data from the user. $_POST is superglobal, which means that it always accessible, regardless of scope - and you can access the

PHP - GET & POST Methods, The PHP provides $_GET associative array to access all the sent information using GET method. Try out following example by putting the source code in test. php� Hi, I have the following code that I want to run only when the “Submit” button is pressed…but a message is echoed even when it has not been clicked…I can’t work out what I need to amend

Comments

Replace action="RockPaperScissor.php" with simply action="". Does it work?
Can you change name="keuzen" to name="keuzen[]"
Start simple debugging with var_dump($_POST)…
This did not work for me.
Just a note. As @Quentin pointed below, <input type="image"> is sending X/Y coordinates of the image itself upon POST, but not it's value. Bear in mind when playing with such type within a form.