What potential issue arises when using isset() with __get() in PHP?

When using isset() with __get() in PHP, the potential issue that arises is that isset() will always return false for properties accessed using __get() because isset() only checks if a variable is set and not if a magic property is accessible through __get(). To solve this issue, you can override the __isset() magic method in your class and implement custom logic to check if the property exists. 

class MyClass {
    private $data = [];

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

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

$obj = new MyClass();
$obj->name = "John";

var_dump(isset($obj->name)); // Output: bool(true)

Keywords

isset __get PHP magic methods undefined properties

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