PHP - Inheritance and Polymorphism
Which of the following is the correct way for a child class constructor in PHP to invoke its parent class constructor?
Which of the following is the correct way for a child class constructor in PHP to invoke its parent class constructor?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the parent constructor call syntax
In PHP, the parent constructor is called usingparent::__construct().Step 2: Analyze each option
parent::__construct(); uses the correct syntax. parent::construct(); uses an incorrect method name. super::__construct(); uses 'super' which is not valid in PHP. this->parent::__construct(); uses invalid syntax.Final Answer:
parent::__construct(); -> Option CQuick Check:
Correct parent constructor call syntax in PHP isparent::__construct();[OK]
Quick Trick: Use parent::__construct() to call parent constructor [OK]
Common Mistakes:
- Using 'super' instead of 'parent'
- Omitting parentheses when calling parent constructor
- Calling parent constructor as a property
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