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PHP OOPs Interview Questions and Answers

Question: Explain the concept of abstract classes.

Answer: Abstract classes cannot be instantiated and may contain abstract methods, which are methods without a body. Subclasses must provide implementations for all abstract methods.

Example:

abstract class Shape { 
abstract public function calculateArea(); 
} 

class Circle extends Shape { 
public function calculateArea() 
{ 
// Implementation for Circle's area calculation 
} 
}

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