What happened when this was suggested many years ago?

scalar-type-signatures.php

<?php

// coercive types, as per PersonFactory author's specification
class ElePHPant {
    public $name, $age, $cuteness, $evil;
    public function __construct(~string $name, ~int $age, ~float $cuteness, ~bool $evil) {
        $this->name = $name;
        $this->age = $age;
        $this->cuteness = $cuteness;
        $this->evil = $evil;
    }
}

// forced types, as per PersonFactory author's specification
class ElePHPant {
    public $name, $age, $cuteness, $evil;
    public function __construct(string $name, int $age, float $cuteness, bool $evil) {
        $this->name = $name;
        $this->age = $age;
        $this->cuteness = $cuteness;
        $this->evil = $evil;
    }
}