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Which of the following statements about anonymous functions in PHP are NOT true? (Choose 2)

Anonymous functions can be bound to objects
Anonymous functions created within object context are always bound to that object
Assigning closure to a property of an object binds it to that object
Methods bind() and bindTo() of the Closure object provide means to create closures with different binding and scope
Binding defines the value of $this and the scope for a closure

Answer(s): B,C

What will be the result of the following operation?
$a = array_merge([1, 2, 3] + [4=>1, 5, 6]);
echo $a[2];

Answer(s): B

Which of the following functions will allow identifying unique values inside an array?

Answer(s): C

When using password_hash() with the PASSWORD_DEFAULT algorithm constant, which of the following is true? (Choose 2)

The algorithm that is used for hashing passwords can change when PHP is upgraded.
The salt option should always be set to a longer value to account for future algorithm requirements.
The string length of the returned hash can change over time.
The hash algorithm that's used will always be compatible with crypt() .

Answer(s): A,C