Which of the following PHP function declarations correctly type hints a parameter to accept an object of the parent class Vehicle?

easy📝 Conceptual Q2 of 15

PHP - Inheritance and Polymorphism

Which of the following PHP function declarations correctly type hints a parameter to accept an object of the parent class Vehicle?

Afunction start(Vehicle v) {}

Bfunction start($v: Vehicle) {}

Cfunction start(Vehicle $v) {}

Dfunction start(&Vehicle $v) {}

Step-by-Step Solution

Solution:

Step 1: Review PHP type hint syntax
Type hinting is done by specifying the class name before the parameter with a $ sign.
Step 2: Analyze options
function start(Vehicle $v) {} uses correct syntax: Vehicle $v. function start($v: Vehicle) {} uses invalid syntax. function start(Vehicle v) {} misses the $ sign. function start(&Vehicle $v) {} uses a reference which is allowed but not related to type hinting correctness.
Final Answer:
function start(Vehicle $v) {} -> Option C
Quick Check:
Correct syntax: ClassName $variable [OK]

Quick Trick: Use ClassName $param for type hinting [OK]

Common Mistakes:

Master "Inheritance and Polymorphism" in PHP

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More PHP Quizzes