<?php
declare(strict_types = 1);
abstract class test{
abstract public function hi(): string;
}
class hello extends test {
public function hi(): string
{
return array();
}
}
Warning: Unsupported declare 'strict_types' in /in/Y0b4J on line 2
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/Y0b4J on line 5
Process exited with code 255.