- var_dump: documentation ( source)
<?php declare(strict_types=1);
class Foo
{
private array $data = [];
/** @param mixed $value */
public function __set(int $name, $value): void
{
$this->data[$name] = $value;
}
public function __isset(int $name): bool
{
return isset($this->data[$name]);
}
public function __unset(int $name): void
{
unset($this->data[$name]);
}
}
$foo = new Foo();
$foo->__set(1, 'one');
$foo->__set(2, 'two');
var_dump(
$foo->__isset(1), // true
$foo->__isset(2) // true
);
$foo->__unset(1);
var_dump(
$foo->__isset(1) // false
);