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Solution: Data Handling Using the PDO Extension and Abstract Methods

Solution: Data Handling Using the PDO Extension and Abstract Methods

A detailed review of the solutions to the challenge involving handling abstract methods with traits and fetching data with PDO extension.

We'll cover the following...

Solution to Task 1

The following PHP code snippet defines a Calculator class and a MathOperations trait. The MathOperations trait should contain an abstract method called performOperation(): float and a calculate(): float method that calls the abstract method to perform a mathematical operation.

PHP
<?php
declare(strict_types=1);
trait MathOperations {
    abstract protected function performOperation(float $a, float $b): float;
    public function calculate(float $a, float $b): float {
        return $this->performOperation($a, $b);
    }
}
class Calculator {
    use MathOperations;
    protected function performOperation(float $a, float $b): float {
        return $a+$b;
    }
}
// Challenge: Implement a specific math operation by modifying the Calculator class.
$calculator = new Calculator();
$result = $calculator->calculate(10.5, 5.2);
echo "Result: " . $result . "\n";
?>

Let’s get into the code.

  • Lines 4–10: This is a PHP trait named MathOperations. Traits are reusable code blocks that can be used in multiple classes. In ...