intdiv samples & polyfill.

intdiv.php

<?php
// https://github.com/itchyny/gojq#difference-to-jq
$intdiv = fn($x, $y) => ($x - $x % $y) / $y;

// polyfill
if (!function_exists('intdiv')) {
    function intdiv($x, $y) {
        return ($x - $x % $y) / $y;
    }
}

$x = 10; $y = 3;

var_dump($x / $y);
var_dump($x / $y | 0);
var_dump(intdiv($x, $y));
var_dump($intdiv($x, $y));