How does the __isset() method help in resolving issues with isset() in PHP?

The issue with using isset() in PHP is that it can't be directly used on inaccessible object properties. To resolve this issue, we can define a magic method called __isset() in the class to check if a property is set or not. This method will be automatically called when isset() is used on inaccessible object properties, allowing us to handle the check internally. 

class MyClass {
    private $data = ['key' => 'value'];

    public function __isset($name) {
        return isset($this->data[$name]);
    }
}

$object = new MyClass();
var_dump(isset($object->key)); // Output: bool(true)
var_dump(isset($object->nonExistentKey)); // Output: bool(false)

Keywords

__isset() isset() method resolving PHP

Related Questions