[Solved] Consider this PHP code:class ParentClass { protected $value = 10;... echo $child->getValue();What will be the output and why? | PHP

PHP - Classes and Objects

Consider this PHP code:

class ParentClass {
  protected $value = 10;
}
class ChildClass extends ParentClass {
  public function getValue() {
    return $this->value;
  }
}
$child = new ChildClass();
echo $child->getValue();

What will be the output and why?

AError: Cannot access protected property

B10, because protected properties are accessible in child classes

Cnull, because property is not public

DFatal error: Undefined property

Step-by-Step Solution

Solution:

Step 1: Understand protected property inheritance
Protected properties are accessible inside the class and any subclass.
Step 2: Analyze method access in child class
The child class method getValue() accesses $this->value, which is allowed for protected properties.
Final Answer:
10, because protected properties are accessible in child classes -> Option B
Quick Check:
Protected property access in subclass = 10 [OK]

Quick Trick: Protected properties are inherited and accessible in subclasses [OK]

Common Mistakes:

Expecting error on protected property access
Confusing protected with private
Assuming property is undefined

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Consider this PHP code:

Step 1: Understand protected property inheritance

Step 2: Analyze method access in child class

Final Answer:

Quick Check:

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