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phphtmlspecialchars

Undefined index when calling htmlspecialchars

I'm getting the following error:

Notice: Undefined index: test

With reference to this line:

$token = htmlspecialchars($_GET["test"]);

Do I need to define test somewhere even though I'm trying to read it from a URL?

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-EDIT-

I had actually looked at the answer linked as a duplicate before posting this but couldn't see anything in it relating to using htmlspecialchars which I thought was causing the problem.

Solution

  • Your variable doesn't exists. Use isset to check this

    if(isset($_GET["test"]))
    $token = htmlspecialchars($_GET["test"]); 
else
    echo "variable test doesn't exist";