Challenge 1 / 1

Challenge! Check out the following code:

// some code that you can't see!

echo $planet['radius']; // prints 50

echo $planet['atmosphere']->getMainElement(); // prints Nitrogen

echo $blackhole; // prints an empty string

$solarSystem[] = $planet;

Which of the following is not true:

$planet could be an array or an object

$solarSystem is definitely an array

$blackHole could be a string or an object

$planet['atmosphere'] is definitely an object

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