PHP PHP Warning: Undefined array key

[cbreemer]

Hey folks,
I hope someone can help explaining two PHP warnings.
My calling code is

xhr.open('POST', "manfac.php", false);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.send(`func=facturen&name=*`);

My PHP file manfac.php starts with these lines:

 <?php

$func = $_POST["func"];
$name = $_POST["name"];
var_dump($_POST);

In the debugger network tab I see these warnings:

PHP Warning:  Undefined array key "func" in C:\Users\cbree\OneDrive\manfac.php on line 3
PHP Warning:  Undefined array key "name" in C:\Users\cbree\OneDrive\manfac.php on line 4

The var_dump command produces this info in the xhr return data:

 array(2) {
  ["func"]=>
  string(8) "facturen"
  ["name"]=>
  string(1) "*"
}

so it seems to me the two parameters func and name are correctly passed with their values facturen and *.
And the PHP code, using these variables $func and $name works as expected.

So why the warnings ? I must be missing something obvious.

 

[OldMan]

Looking at this line -> xhr.send(func=facturen&name=*);
It's hard to tell if this is a single quote or a tilde mark. What happens if you use the double quote?>

 

[cbreemer]

Looking at this line -> xhr.send(func=facturen&name=*);
It's hard to tell if this is a single quote or a tilde mark. What happens if you use the double quote?>

No tildes here señor 🤓
And the quotes are backticks, carried over from the original code which had variable names in there.
It makes no difference if I replace them by normal quotes, be it single or double.

 

[cbreemer]

I finally realized what was happening here. The Debugger Network tab showed test,php as a link, and being the gullible pensioner I am, I clicked on it hoping to see some useful stuff. All that did was excute the php a second time, this time without parameters. And then I wonder why that shows the error... Derp.