krmgns

set_error_handler(function ($errno, $errstr, $errfile, $errline, $errcontext = null) {
    prs("here! $errstr");
});

class ErrorHelper {
    var $lastError;
    function setErrorHandler() {
        $this->lastError = null;
        set_error_handler(function ($errno, $errstr, $errfile, $errline, $errcontext = null) {

krmgns

<?php
function super(...$args) {
    $object = debug_backtrace(1, 2)[1]['object'];
    $parent = get_parent_class($object); // Let it errorize.
    if ($parent && method_exists($parent, '__construct')) {
        $ref = new ReflectionMethod($parent, '__construct');
        $ref->invoke($object, ...$args);
    }
}

krmgns

<?php

function is_prime(int|float $n): bool {
    if ($n == 2)
        return true;

    if ($n < 2 or $n % 2 == 0)
        return false;

    for ($i = 3; $i <= sqrt($n); $i++) {

krmgns

// Rewrite
- if ($shippingInfo && $shippingInfo['cost'] && $this->formatPrice($shippingInfo['cost'] != 0)) {
+ if (isset($shippingInfo['cost']) && $this->formatPrice($shippingInfo['cost']) > 0)

- $order_id = $this->request->get['order_id'];
+ $order_id = (int) $this->request->get['order_id'];

// Refactor
private function formatPrice($number)
{

krmgns

<canvas id="c" width="1024" height="1024">
<script>
// Creds: https://twitter.com/aemkei/status/1378106731386040322
// let cx = c.getContext('2d'), x, y
// for (x = 0; x < 256; x++) {
//   for (y = 0; y < 256; y++) {
//     if ((x ^ y) % 2) {
//       cx.fillRect(x * x, y * y, x, y);
//     }
//   }

krmgns

<?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;
    }
}

krmgns

// https://betterexplained.com/examples/birthday/birthday.html
function calc(people) {
    let ret = {
        days: 365,
        people: people
    }

    ret.combinations = ret.people * (ret.people - 1) / 2
    ret.chance = (ret.days - 1) / ret.days
    ret.expected = 1 - (ret.chance ** ret.combinations)

krmgns

<?php

if (!function_exists('each')) {
    function each(array &$array) {
        $value = current($array);
        $key = key($array);

        if (is_null($key)) {
            return false;
        }

krmgns

function convert_base(input, fromBase, toBase)
{
    const chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

    if (typeof fromBase == 'number') {
        if (fromBase < 2 || fromBase > 62) {
            throw ('Invalid base for from chars, min=2 & max=62')
        }
        fromBase = chars.substr(0, fromBase)

krmgns

class A { protected int $x; }
class AA extends A { protected $x; }
 // -> PHP Fatal error: Type of acme\AA::$ must be int (as in class acme\A)

No var name here "acme\AA::$".