Type hinting in PHP allows the identification of the following variable types: (Choose 2)

Question

Options

• AString
• BInteger
• CArray
• DAny class or interface type
• EAll of the above

• A
  10% (3)
• B
  3% (1)
• C
  81% (25)
• E
  6% (2)

Explanation

PHP's type hinting system - particularly in PHP 5.x - only natively supported array (introduced in PHP 5.1) and class/interface names as valid type hints for function parameters, making C and D the correct choices for that context.

Why A and B are wrong: Scalar types like string and int (integer) were not valid type hints in PHP 5.x - attempting to use them would throw a fatal error. Scalar type declarations were only introduced in PHP 7.0, so this question targets the pre-7.0 behavior.

Why E is wrong: Since A (String) and B (Integer) are not supported in the PHP version this question targets, "All of the above" cannot be correct.

Memory tip: Think of PHP 5.x type hints as only accepting "complex" or "structured" types - things with a defined structure like an array or a class/interface. Primitive scalars (string, int, float, bool) had to wait for PHP 7. A handy phrase: "PHP 5 hints at arrays and classes; PHP 7 hints at scalars too."

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