What are the potential design flaws in PHP classes when certain properties are accessible through multiple instances?

When certain properties are accessible through multiple instances of a PHP class, it can lead to unintended side effects or inconsistencies in the data. To solve this issue, you can make the properties private or protected and provide getter and setter methods to access and modify them. 

class MyClass {
    private $property;

    public function getProperty() {
        return $this->property;
    }

    public function setProperty($value) {
        $this->property = $value;
    }
}

$instance1 = new MyClass();
$instance1->setProperty('Value 1');

$instance2 = new MyClass();
$instance2->setProperty('Value 2');

echo $instance1->getProperty(); // Output: Value 1
echo $instance2->getProperty(); // Output: Value 2

Keywords

PHP classes properties accessibility instances design flaws

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