👀 Views: 85 💬 Answers: 1 📅 Created: 2025-06-09

php json encoding php8.1

I'm working with an 'Invalid JSON' behavior when trying to use `json_encode` on an object that contains properties with private visibility. In PHP 8.1, I've defined a class with some private properties and a method that returns an array representation of those properties. However, when I pass the object to `json_encode`, it fails with the warning: `json_encode(): Invalid UTF-8 sequence in argument`. I've tried using `json_last_error()` to debug, but it just returns `JSON_ERROR_UTF8`. Here’s a simplified version of my code: ```php class MyClass { private string $name; private int $age; public function __construct(string $name, int $age) { $this->name = $name; $this->age = $age; } public function toArray(): array { return [ 'name' => $this->name, 'age' => $this->age ]; } } $obj = new MyClass("John Doe", 30); $json = json_encode($obj->toArray()); if ($json === false) { echo 'JSON behavior: ' . json_last_error_msg(); } ``` I’ve confirmed that both properties contain valid data, and I’ve tried using `mb_convert_encoding` to ensure they are UTF-8 encoded. The `toArray()` method is returning a simple associative array, which should be fine for encoding. I’ve also checked the PHP configuration for `mbstring` and `json` extensions, which are both enabled. Any advice on how to resolve this scenario or debug this further would be appreciated!