- What is a QR code? This article will make you understand instantly! 1. What is a QR Code? In Simple Words.Simply put, a QR code is like a "portable gateway" for information.It can turn a website link, a piece of text, a digital business card, or even a Wi-Fi password into a black-and-white square pattern that your phone's camera can easily recognize. You don’t need to type long URLs or complicated words—just scan it, and
- How to get the Universal Unique Identifier (UUID) of the computer motherboard UUID is a unique hardware identifier assigned by the motherboard manufacturer.wmic csproduct get uuidwmic csproduct get uuidUUID03560274-043C-056F-0D06-CB0700080009In ThinkPaHP5, call the wmic csproduct get uuid command of Windows to obtain the UUID of the motherboard, public function getMotherboardUUID() { // call WMIC command exec('wmic csprod
- Test of bad pixels on mobile phones and computer , and imaging principles of screens Nowadays, mobile phone and computer screens have become an essential part of people’s daily lives and work. Whether it’s handling documents, watching videos, or doing professional design, the display quality of the screen directly affects the user experience. This article will explain the basic principles of screen display, including RGB color composition an