BenMorel

<?php

/**
 * Generates a php.ini file from runtime ini directives, excluding extensions incompatible with JIT.
 * I did not find a way to disable an extension from the command line, so this script is a workaround.
 *
 * Use it this way:
 *
 * php generate-jit-php-ini.php > php.ini
 * php -n -c php.ini

BenMorel

<?php

final class SafeCast
{
    /**
     * Converts the given variable to an integer.
     *
     * Allowed types are int, float and string.
     *
     * - int values are returned as is;

dg

<?php

declare(strict_types=1);

// Updates all the version constraints of dependencies in the composer.json file to their latest version.
//
// usage: composer-frontline.php                (updates all Nette packages)
//        composer-frontline.php  doctrine/*    (updates all Doctrine packages)
//        composer-frontline.php  *             (updates all packages)

BenMorel

<?php

/**
 * This script downloads the list of releases of a project via the GitHub API,
 * and generates a changelog out of it.
 *
 * Example, to generate a changelog for brick/math:
 *
 * php changelog-from-github-api.php brick/math > CHANGELOG.md
 */

MichaelSimons

Retrieving Docker Image Sizes

There are two metrics that are important to consider when discussing the size of Docker images.

1. Compressed size - This is often referred to as the wire size. This affects how fast/slow images can be pulled from a registry. This impacts the first run experience on machines where images are not cached.
2. Uncompressed size - This is often referred to as the size on disk. This affects how much local storage is required to support your Docker workloads.

The example commands shown below will work on Windows, MacOS, and Linux.

How to Measure the Compressed Size

jamesgmarks

DELIMITER //

CREATE FUNCTION BIN_TO_UUID(b BINARY(16))
RETURNS CHAR(36)
BEGIN
   DECLARE hexStr CHAR(32);
   SET hexStr = HEX(b);
   RETURN LOWER(CONCAT(
        SUBSTR(hexStr, 1, 8), '-',
        SUBSTR(hexStr, 9, 4), '-',

mjarkk

NOT UP TO DATE!

Things in this document might not work or be broken nowadays

my laptop:

I'm writing this here because a few things in here are spesific to this model laptop.
Dell XPS 15 9560 (4k) touch screen

Some notes:

Most things after setup are not specific for this laptop
# = run as root

shamil

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

nikic

Why objects (usually) use less memory than arrays in PHP

This is just a small post in response to [this tweet][tweet] by Julien Pauli (who by the way is the release manager for PHP 5.5). In the tweet he claims that objects use more memory than arrays in PHP. Even though it can be like that, it's not true in most cases. (Note: This only applies to PHP 5.4 or newer.)

The reason why it's easy to assume that objects are larger than arrays is because objects can be seen as an array of properties and a bit of additional information (like the class it belongs to). And as array + additional info > array it obviously follows that objects are larger. The thing is that in most cases PHP can optimize the array part of it away. So how does that work?

The key here is that objects usually have a predefined set of keys, whereas arrays don't:

cecilemuller

<?php

function get_combinations($arrays) {
	$result = array(array());
	foreach ($arrays as $property => $property_values) {
		$tmp = array();
		foreach ($result as $result_item) {
			foreach ($property_values as $property_value) {
				$tmp[] = array_merge($result_item, array($property => $property_value));
			}