- thinkphp5实现ajax图片上传，压缩保存到服务器 //上传图片方法 function upimg(obj){ var fileData = obj.files[0];//这是我们上传的文件 console.log(fileData) var formData = new FormData(); // 服务端要求参数是 pic1 formData.append('image',fileData); $.ajax({ url:"{:url('user/upmemberphoto')}", type:'post',
- tp5.0接收base64字符串，转换为图片存储为文件 压缩到600宽度，并且图片不旋转90度/*判断图片是否存在 存在则保存图片路径 系统进程结束之后单独上传图片上传图片*/ $photo=input('photo',''); $img_url = '';//图片路径 $base64_image = str_replace(' ', '+', $photo); //post方式接收的数据, 加号会被替换为空格, 需要重新替换回来, 若不是post数据, 不需要执行 if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image, $result)) { $image_data = base64_
- 时间戳是什么？一文读懂计算机世界的“时间密码” 在日常生活中，我们习惯用“2026-04-15 14:30:00”这样直观的形式记录时间。但在计算机系统、网络通信与数据存储的底层，时间往往被压缩成一串看似毫无规律的数字——这就是时间戳（Timestamp）。它不仅是开发者日常接触的基础概念，更是现代互联网高效运转的隐形基石。时间戳的核心原理时间戳的本质，是从一个固定起点开始累计的“时间刻度”。目前全球IT行业最广泛采用的是 Unix 时间戳，它以 1970年1月1日 00:00:00 UTC（协调世界时）为纪元起点（Epoch），记录从这一刻起经过的秒数或毫秒数。例如，数字 1744675800 并不是随机生成的代码，而是对应着某个精确到秒的时刻。之所以选择1970年，是因为早期Unix系统诞生于20世纪60年代末，开发者将1970年定为“时间元年”。这一简
- 删掉图片文件，网页照样显示？揭秘「把图片变成字符串」的黑魔法 你有没有遇到过这种尴尬的情况：你精心写了一个 HTML 网页，里面配了漂亮的图标和照片。当你把文件夹 发给同事，或者部署到服务器上时，对方打开一看——全是破碎的图片图标 。原因是：图片路径错了，或者图片文件漏传了。如果告诉你，其实根本不需要图片文件，只要把图片变成一串“乱码 ”字符，直接写在代码里，网页就能正常显示图片，而且一个文件就能搞定所有，你信吗？这不是魔术，这是前端开发 中一个非常实用的小技巧：Base64 图片编码。今天就来给不知道这个功能的朋友，好好科普一下这个“黑科技”。什么是 Base64？简单来说，计算机里的图片本质上是二进制数据（0 和 1），而网页代码是文本。Base64 就是一种“翻译规则”，它能把二进制图片数据，翻译成纯文本字符（比如 A-Z, a-z, 0-9, +, /）。一旦图片
- Delete the Image Files, Yet the Website Still Displays? Revealing the "Magic" of Turning Images into Strings Have you ever encountered this awkward situation:You carefully wrote an HTML webpage, complete with beautiful icons and photos. But when you send the folder to a colleague or deploy it to a server, they open it and see—broken image icons everywhere ❌.The reason? The image path was wrong, or the image files were missing during transfer.What if I told you that
- Decoding the Book's "ID Card": A Complete Guide to the ISBN On the back cover of any formally published book, you'll always find a long barcode with the letters "ISBN" and a string of numbers. This string is like the book's "ID number," unique worldwide. What information is encoded in this mysterious string? How does it work? And for us developers and tech enthusiasts, what's the significance of understan
- Demystifying Base64 Images: A Developer's Guide to Principles, Pros & Cons, and Best Practices In our daily work as developers, especially when dealing with front-end code and data transmission, we often encounter long, cryptic strings starting with data:image/png;base64,. This is our subject for today: the Base64 Image.You might have seen it in CSS, within the src attribute of an HTML tag, or in API response data. It looks mysterious and verbose. Bu
- 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