File core/src/WarnDynamicPropertyTrait.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	namespace Atk4\Core;
6:
7:	/**
8:	* This trait implements https://github.com/php/php-src/pull/7390 for lower PHP versions
9:	* and also emit a warning when isset() is called on undefined variable.
10:	*/
11:	trait WarnDynamicPropertyTrait
12:	{
13:	protected function warnPropertyDoesNotExist(string $name): void
14:	{
15:	// match native PHP behaviour as much as possible
16:	// https://3v4l.org/2KR3m
17:	$class = static::class;
18:	try {
19:	$propRefl = new \ReflectionProperty($class, $name);
20:	if (!$propRefl->isPrivate() && !$propRefl->isPublic() && !$propRefl->isStatic()) {
21:	throw new \Error('Cannot access protected property ' . $class . '::$' . $name);
22:	}
23:	} catch (\ReflectionException $e) {
24:	}
25:
26:	'trigger_error'('Undefined property: ' . get_debug_type($this) . '::$' . $name, \E_USER_WARNING);
27:	}
28:
29:	public function __isset(string $name): bool
30:	{
31:	$this->warnPropertyDoesNotExist($name);
32:
33:	return isset($this->{$name});
34:	}
35:
36:	/**
37:	* @return mixed
38:	*/
39:	public function &__get(string $name)
40:	{
41:	$this->warnPropertyDoesNotExist($name);
42:
43:	return $this->{$name};
44:	}
45:
46:	/**
47:	* @param mixed $value
48:	*/
49:	public function __set(string $name, $value): void
50:	{
51:	$this->warnPropertyDoesNotExist($name);
52:
53:	$this->{$name} = $value;
54:	}
55:
56:	public function __unset(string $name): void
57:	{
58:	$this->warnPropertyDoesNotExist($name);
59:
60:	unset($this->{$name});
61:	}
62:	}
63: