使用 x-www-form-urlencoded 时 PHP 不填充 $_POST

Question

PHP 5.4.17

I have a simple html form that looks something like this:

index.html

<form method="POST" action="/addnewaccount.php">
    <input type="text" name="firstname" />
    <button type="submit">Submit</button>
</form>

addnewaccount.php

<?php
var_dump($_POST); // array(0) {}
var_dump($_REQUEST); // array(0) {}
var_dump(file_get_contents('php://input')); //string(0) ""
var_dump($HTTP_RAW_POST_DATA); // NULL

When this form gets submitted, php will not populate the $_POST or $_REQUEST variables. They are just empty arrays.

I have checked the following in my php.ini file:

enable_post_data_reading = On
post_max_size = 10M
variables_order = "GPCS"
request_order = "GP"

If I change the form's enctype to "multipart/form-data", the $_POST and $_REQUEST variables are populated, so I feel that the issue is with the default enctype of "x-www-form-urlencoded", but I can't figure out how to get things to work with the default.

Answer 1

I was able to solve this problem. I discovered that it was an interaction of our Node proxy and php.

In our Node code, we were using the 'body-parser' npm package. We had a line where we were using the middleware for form-data like this:

app.use(bodyParser.urlencoded({extended: true}));

That middleware converted the form data to JSON before the request was proxied which prevented PHP from getting the data.

Hopefully this helps someone who might have a similar situation in the future.