PHP does not recognize Json code

Question

I installed php + apache via Xampp. PHP is working, but it doesn’t recognize Json, anyone knows if they need to enable anything in php.ini?

Returns the error: Notice: Undefined index: jsoncallback

The return line is:

echo $_GET["jsoncallback"] . '(' . json_encode("Valor=" . $teste ) . ');';    

The code works, I’ve run the same code on the localhost of another computer, and also on a remote server, and it works perfectly, only on this computer that I installed via Xampp does not work.

Thank you

Answer 1

The mistake you’re getting:

Notice: Undefined index: jsoncallback

Indicates that the index in the matrix $_GET with the name jsoncallback there is no.

When you do:

echo $_GET["jsoncallback"];

You’re trying to access a matrix input that doesn’t exist.

To better control this you must make use of the function isset() of PHP:

if (isset($_GET["jsoncallback"])) {
  echo $_GET["jsoncallback"];
}
else {
  echo "Não foi localizado: jsoncallback";
}

---

Note: You should check if on the page address you have a URL parameter with the name jsoncallback.

Reserved Variable GET - PHP

An associative array of variables passed to the Current script via the URL Parameters.

That translated:

An associative array of variables passed to the current script through the URL parameters.