Testing default scalar type hints.

testWeakTypesChecks.php

<?php
function concatStrings(string $a, string $b) {

    return $a . ' - ' . $b;
}

function sum(int $a, int $b) {

    return $a + $b;
}


echo sum("1000", "110.33") . PHP_EOL;
// output is
// 1110

echo concatStrings(1, 222) . PHP_EOL;
// output is:
// 1 - 222

echo PHP_EOL;