PHP写下读取图片自定义信息_exif或者什么的
PHP写入读取图片自定义信息_exif或者什么的？
需求描述：
使用PHP对图片文件进行优化处理，但此优化处理只能进行一次，二次进行会对图片造成不可恢复的损坏。期望在图片一次处理之后，在图片文件中写入一个自定义的字符串，什么都行，仅用于判断图片是否经过处理。
期待可以使用PHP解决。目前想到JPEG格式的话有 EXIF信息，可以尝试从这个作为突破，在EXIF信息中写入一个自定义的字符串。但GIF，PNG,BMP呢，怎么能解决常用的网络图片格式？
google到这货
Imagick::setImageProperty
根据文档http://www.php.net/manual/zh/imagick.setimageproperty.php
貌似刚好符合要求，但是使用这个函数保存图片，再次读取却为空，不晓得是不是我的用法有问题
<br />
$image = new Imagick($file);<br />
$image->setImageProperty('Exif:Make', 'Imagick');<br />
$image->writeImage($file2);<br />
<br />
$image2 = new Imagick($file2);<br />
echo $image->getImageProperty('Exif:Make');<br />
这个是一个思路，但没能实现，真希望是我用法有问题，而不是这个函数不可实现。
又尝试使用 APP13
<br />
$size = getimagesize('1.jpg', $info);<br />
<br />
var_dump($size);<br />
if(isset($info['APP13']))<br />
{<br />
$iptc = iptcparse($info['APP13']);<br />
var_dump($iptc);<br />
}<br />
但也不行。
难道我一直在走弯路？有什么好的办法吗？要的不多，就是想在不破快图片的基础上在图片数据中写入一个字符串，供下次读取这个字符串。
大大们现身吧，给点指点，解决问题立刻散分。
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1670
14
1428
52
1329
25
1274
29
1256
24
Solution: Your organization requires you to change your PIN
Oct 04, 2023 pm 05:45 PM
The message "Your organization has asked you to change your PIN" will appear on the login screen. This happens when the PIN expiration limit is reached on a computer using organization-based account settings, where they have control over personal devices. However, if you set up Windows using a personal account, the error message should ideally not appear. Although this is not always the case. Most users who encounter errors report using their personal accounts. Why does my organization ask me to change my PIN on Windows 11? It's possible that your account is associated with an organization, and your primary approach should be to verify this. Contacting your domain administrator can help! Additionally, misconfigured local policy settings or incorrect registry keys can cause errors. Right now
How to adjust window border settings on Windows 11: Change color and size
Sep 22, 2023 am 11:37 AM
Windows 11 brings fresh and elegant design to the forefront; the modern interface allows you to personalize and change the finest details, such as window borders. In this guide, we'll discuss step-by-step instructions to help you create an environment that reflects your style in the Windows operating system. How to change window border settings? Press + to open the Settings app. WindowsI go to Personalization and click Color Settings. Color Change Window Borders Settings Window 11" Width="643" Height="500" > Find the Show accent color on title bar and window borders option, and toggle the switch next to it. To display accent colors on the Start menu and taskbar To display the theme color on the Start menu and taskbar, turn on Show theme on the Start menu and taskbar
How to change title bar color on Windows 11?
Sep 14, 2023 pm 03:33 PM
By default, the title bar color on Windows 11 depends on the dark/light theme you choose. However, you can change it to any color you want. In this guide, we'll discuss step-by-step instructions for three ways to change it and personalize your desktop experience to make it visually appealing. Is it possible to change the title bar color of active and inactive windows? Yes, you can change the title bar color of active windows using the Settings app, or you can change the title bar color of inactive windows using Registry Editor. To learn these steps, go to the next section. How to change title bar color in Windows 11? 1. Using the Settings app press + to open the settings window. WindowsI go to "Personalization" and then
How to enable or disable taskbar thumbnail previews on Windows 11
Sep 15, 2023 pm 03:57 PM
Taskbar thumbnails can be fun, but they can also be distracting or annoying. Considering how often you hover over this area, you may have inadvertently closed important windows a few times. Another disadvantage is that it uses more system resources, so if you've been looking for a way to be more resource efficient, we'll show you how to disable it. However, if your hardware specs can handle it and you like the preview, you can enable it. How to enable taskbar thumbnail preview in Windows 11? 1. Using the Settings app tap the key and click Settings. Windows click System and select About. Click Advanced system settings. Navigate to the Advanced tab and select Settings under Performance. Select "Visual Effects"
Display scaling guide on Windows 11
Sep 19, 2023 pm 06:45 PM
We all have different preferences when it comes to display scaling on Windows 11. Some people like big icons, some like small icons. However, we all agree that having the right scaling is important. Poor font scaling or over-scaling of images can be a real productivity killer when working, so you need to know how to customize it to get the most out of your system's capabilities. Advantages of Custom Zoom: This is a useful feature for people who have difficulty reading text on the screen. It helps you see more on the screen at one time. You can create custom extension profiles that apply only to certain monitors and applications. Can help improve the performance of low-end hardware. It gives you more control over what's on your screen. How to use Windows 11
10 Ways to Adjust Brightness on Windows 11
Dec 18, 2023 pm 02:21 PM
Screen brightness is an integral part of using modern computing devices, especially when you look at the screen for long periods of time. It helps you reduce eye strain, improve legibility, and view content easily and efficiently. However, depending on your settings, it can sometimes be difficult to manage brightness, especially on Windows 11 with the new UI changes. If you're having trouble adjusting brightness, here are all the ways to manage brightness on Windows 11. How to Change Brightness on Windows 11 [10 Ways Explained] Single monitor users can use the following methods to adjust brightness on Windows 11. This includes desktop systems using a single monitor as well as laptops. let's start. Method 1: Use the Action Center The Action Center is accessible
Use java's File.length() function to get the size of the file
Jul 24, 2023 am 08:36 AM
Use Java's File.length() function to get the size of a file. File size is a very common requirement when dealing with file operations. Java provides a very convenient way to get the size of a file, that is, using the length() method of the File class. . This article will introduce how to use this method to get the size of a file and give corresponding code examples. First, we need to create a File object to represent the file we want to get the size of. Here is how to create a File object: Filef
Hongmeng native application random poetry
Feb 19, 2024 pm 01:36 PM
To learn more about open source, please visit: 51CTO Hongmeng Developer Community https://ost.51cto.com Running environment DAYU200:4.0.10.16SDK: 4.0.10.15IDE: 4.0.600 1. To create an application, click File- >newFile->CreateProgect. Select template: [OpenHarmony] EmptyAbility: Fill in the project name, shici, application package name com.nut.shici, and application storage location XXX (no Chinese, special characters, or spaces). CompileSDK10, Model: Stage. Device
