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PHP Redirect with POST data

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不思量自难忘°
不思量自难忘° 2020-11-22 06:22

I did some research on this topic, and there are some experts who have said that it is not possible, so I would like to ask for an alternative solution.

My situation

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  • 我在风中等你
    2020-11-22 06:58

    $_SESSION is your friend if you don't want to mess with Javascript

    Let's say you're trying to pass an email:

    On page A:

    // Start the session
session_start();

// Set session variables
$_SESSION["email"] = "awesome@email.com";

header('Location: page_b.php');

    And on Page B:

    // Start the session
session_start();

// Show me the session!  
echo "<pre>";
print_r($_SESSION);
echo "</pre>";

    To destroy the session

    unset($_SESSION['email']);
session_destroy();
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  • 醉酒成梦
    2020-11-22 06:59

    I faced similar issues with POST Request where GET Request was working fine on my backend which i am passing my variables etc. The problem lies in there that the backend does a lot of redirects, which didnt work with fopen or the php header methods.

    So the only way i got it working was to put a hidden form and push over the values with a POST submit when the page is loaded.

    echo
'<body onload="document.redirectform.submit()">   
    <form method="POST" action="http://someurl/todo.php" name="redirectform" style="display:none">
    <input name="var1" value=' . $var1. '>
    <input name="var2" value=' . $var2. '>
    <input name="var3" value=' . $var3. '>
    </form>
</body>';
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  • 深忆病人
    2020-11-22 07:00

    Generate a form on Page B with all the required data and action set to Page C and submit it with JavaScript on page load. Your data will be sent to Page C without much hassle to the user.

    This is the only way to do it. A redirect is a 303 HTTP header that you can read up on http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html, but I'll quote some of it:

    The response to the request can be found under a different URI and SHOULD be retrieved using a GET method on that resource. This method exists primarily to allow the output of a POST-activated script to redirect the user agent to a selected resource. The new URI is not a substitute reference for the originally requested resource. The 303 response MUST NOT be cached, but the response to the second (redirected) request might be cacheable.

    The only way to achieve what you're doing is with a intermediate page that sends the user to Page C. Here's a small/simple snippet on how you can achieve that:

    <form id="myForm" action="Page_C.php" method="post">
<?php
    foreach ($_POST as $a => $b) {
        echo '<input type="hidden" name="'.htmlentities($a).'" value="'.htmlentities($b).'">';
    }
?>
</form>
<script type="text/javascript">
    document.getElementById('myForm').submit();
</script>

    You should also have a simple "confirm" form inside a noscript tag to make sure users without Javascript will be able to use your service.

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  • 一个人的身影
    2020-11-22 07:04 
    function post(path, params, method) {
    method = method || "post"; // Set method to post by default if not specified.



    var form = document.createElement("form");
    form.setAttribute("method", method);
    form.setAttribute("action", path);

    for(var key in params) {
        if(params.hasOwnProperty(key)) {
            var hiddenField = document.createElement("input");
            hiddenField.setAttribute("type", "hidden");
            hiddenField.setAttribute("name", key);
            hiddenField.setAttribute("value", params[key]);

            form.appendChild(hiddenField);
         }
    }

    document.body.appendChild(form);
    form.submit();
}

    Example:

     post('url', {name: 'Johnny Bravo'});
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  • 梦毁少年i
    2020-11-22 07:05

    You can let PHP do a POST, but then your php will get the return, with all sorts of complications. I think the simplest would be to actually let the user do the POST.

    So, kind-of what you suggested, you'll get indeed this part:

    Customer fill detail in Page A, then in Page B we create another page show all the customer detail there, click a CONFIRM button then POST to Page C.

    But you can actually do a javascript submit on page B, so there is no need for a click. Make it a "redirecting" page with a loading animation, and you're set.

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  • 梦毁少年i
    2020-11-22 07:08

    I know this is an old question, but I have yet another alternative solution with jQuery:

    var actionForm = $('<form>', {'action': 'nextpage.php', 'method': 'post'}).append($('<input>', {'name': 'action', 'value': 'delete', 'type': 'hidden'}), $('<input>', {'name': 'id', 'value': 'some_id', 'type': 'hidden'}));
actionForm.submit();

    The above code uses jQuery to create a form tag, appending hidden fields as post fields, and submit it at last. The page will forward to the form target page with the POST data attached.

    p.s. JavaScript & jQuery are required for this case. As suggested by the comments of the other answers, you can make use of <noscript> tag to create a standard HTML form in case JS is disabled.

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