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DevWL – Blog

Wiktor Liszkiewicz

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Blog Posts:

How to verify file signature?

IT

To check if the file came from a legitimate source, we often need to compare file signature and checksum. But how do we do that? As an example, we will download a Cygwin installation file. Then we will check if the file came from a legitimate source by comparing a...

Windows 10/11 – Copy & Replace only new or modified files. Skip same/unchanged files.

IT, IT Help Desk, Windows

Skipping unchanged/unmodified files using Copy&Paste on Windows? Did you ever try how to move a whole directory to a backup folder, skipping all files which were not changed? This can not be done with simple copy/paste in Windows GUI. However, Windows already has...

PrestaShop Database

PrestaShop

Understanding PrestaShop. To be able to understand and think in PrestaShop. We first need to get to know the PrestaShop database. A model database is available for version 1.4.7.2 (SQL Schema) [here]. However, for PrestaShop 1.7 The database structure of PrestaShop...

Docker setup MySQL with phpMyAdmin on Windows10/11

DevOps, Docker, mysql, PHP

Setting up MySQL docker container with phpMyAdmin. Spinning MySQL docker container On WIndows10. Just make sure to change "SYMFONY" to your actual Windows username.MySQL database should be saved in "downloads" directory. docker run --name mysql-server_v2 -d...

API documentation platforms

Project Management, REST API

En example of API documentation tools for your API platforms based on examples of some successful companies: InPost - uses Confluence https://www.atlassian.com/ InPost company is using Confluence to describe their shipping API. See example of their documentation here...

Automatic file

Networking, software

Automate file synchronization between local machine and server FTP. Install WinSCPCreate script and .bat file (click to run)or automatically run .bat file Download files only https://www.youtube.com/watch?v=ndvEYOQLc4c Upload files only...

Windows 10—How to Share a Whole Drive on local network

Networking

How to share a whole drive in a small local network (without Windows server). Basic scenario for a small local network like router and switch connecting two or three PC station sharing Windows 10 operating system. Already tried? You have created a shared folder, but...

PHP Linked List with end and start List Node pointers

IT, PHP

<?php class ListNode { public $data = NULL; public $next = NULL; function __construct(string $data = NULL) { $this->data = $data; } } class LinkedList { private $_firstNode = NULL; private $_lastNode = NULL; private $_totalNodes = 0; function insert(string $data =...

PHP float number not add up

PHP, PHP fame of glory

Why my numbers are not equal PHP? Floating point precision Floating point numbers have limited precision. Although it depends on the system, PHP typically uses the IEEE 754 double precision format, which will give a maximum relative error due to rounding in the order...

Division in PHP

PHP

Do we still need intdiv() since PHP 8.0 / operator supports error throwing when dividing by 0? intdiv(10, 3) == 3;intdiv(-10, 3) == -3; (int)(10 / 3) == 3;(int)(-10 / 3) == -3; floor(10/3) == 3;floor(-10/3) == -4; <?php $start1 = microtime(true); $i = 1; while ($i...

PHP division by 0

PHP

Divide by 0 in PHP How the division by 0 behave in PHP8, PHP7, PHP5 PHP has evolved in the last few years. Before when dividing by 0 we only get a warning. This behaviour did not change until php8, where numeric division 10 / 0 resulted in rasing an Error...

PHP one directional linked list

Algorithms, Data structure, PHP

To create a list, we need to declare two classes, List Node and Linked List classes. Basic PHP one directional linked list PHP Linked list and its methods <?php class ListNode { public $data = NULL; public $next = NULL; function __construct(string $data = NULL) {...