Note: you cant change parameter type for abstract method defined in interface.
<?php
abstract class AbstractAssocArray imlements ArrayAccess
{
abstract public function offsetSet($offset, $value): void;
...
}
abstract class AbstractAssocArray2 extends AbstractAssocArray
{
abstract public function offsetSet(string $offset, $value): void;
}
class AssocArray extends AbstractAssocArray2
{
public function offsetSet(string $offset, $value): void
{
$this->{$offset} = $value;
}
}
?>
It's throw fatal error: Declaration of AbstractAssocArray::offsetSet(string $offset, $value): void must be compatible with AbstractAssocArrayAccess::offsetSet($offset, $value).
