How can Getter/Setter methods be utilized to enforce specific data types in PHP properties?

To enforce specific data types in PHP properties, Getter/Setter methods can be used. By creating Getter methods to retrieve the property value and Setter methods to set the property value, we can include type-checking logic within these methods to ensure that only values of the desired data type are accepted. 

class User {
    private $name;

    public function getName() {
        return $this->name;
    }

    public function setName($name) {
        if (is_string($name)) {
            $this->name = $name;
        } else {
            throw new InvalidArgumentException('Name must be a string');
        }
    }
}

$user = new User();
$user->setName('John');
echo $user->getName(); // Output: John

$user->setName(123); // Throws an exception

Keywords

Getter Setter Data types PHP properties Enforcement

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