Creation of dynamic property is deprecated !

[Tak-Pesar]

Description

The following code ( This should never happen when I'm using magic methods, but unfortunately it does happen sometimes ):

<?php
final class Content {
	protected array $data = array('sequence'=>1);

	public function &__get(string $property) : mixed {
		if(isset($this->data[$property]) === false):
			$this->data[$property] = null;
		endif;
		return $this->data[$property];
	}
	public function __set(string $name,mixed $value) : void {
		$this->data[$name] = $value;
	}
}

$content = new Content();
$result = $content->sequence * 2 + 1;
$content->sequence += 1;
print $result;

Result:

3

But sometimes when the number of such requests increases, I receive the following warning :

Creation of dynamic property Content::$sequence is deprecated 18

PHP Version

PHP 8.2.11

Operating System

Linux

[iluuu1994]

@Tak-Pesar Is it possible that Content in your code contains some code that calls something out side of the class, that again assigns to sequence? E.g. https://3v4l.org/smIKL

[Tak-Pesar]

No, this is exactly my code , Without any changes, it works properly, but I don't know under what conditions I suddenly get this warning, the main reason is not clear at all.
It is not possible to receive such a change because I am not trying to create a non-existent property from within the class itself or other things like this

[iluuu1994]

You can try using set_error_handler and debug_backtrace to see where the error occurs. __get and __set have guards, meaning if you call get/set the same property again it will trigger a real property-read/write, even outside of the current class.

[Tak-Pesar]

In fact, I do this : https://3v4l.org/L7GIR

I create an object and save it and call it later in my other class, I don't put it in a function
And so I do the same thing multiple times but I only get one warning

[iluuu1994]

@Tak-Pesar Can you try using set_error_handler and debug_backtrace and report what the stack trace says? It's hard to understand this issue without a reproducer, or more information.