Found a total of 10000 related content
Show Thumbnail of Image Upload AJAX/PHP
Article Introduction：Update 18/11/2012: The new version of this upload is now here JQUERY AJAX IMAGE UPLOAD THUMBNAIL EXAMPLE.
This is how you can add a file/image upload tool to your forms and have AJAX store the file with PHP and return a thumbnailed version to the us
2025-03-04
comment 0
1140
jQuery AJAX Image Upload Thumbnail Example
Article Introduction：This article demonstrates how to upload images using Ajax and display a thumbnail preview without page reloads. The process involves client-side JavaScript for handling the upload and a PHP backend for thumbnail generation and image storage.
Client
2025-02-24
comment 0
529
python pillow resize image example
Article Introduction：Use Pillow to adjust the image size to select methods based on whether the aspect ratio is maintained: 1. Direct resize() will stretch the image, which is suitable for scenes where proportions are not required; 2. Use thumbnail() to automatically maintain the aspect ratio, generate undistorted thumbnails, and the maximum size does not exceed the specified value; 3. Custom resize_with_aspect_ratio() function can flexibly control the target width and height, and improve quality by calculating the scaling ratio and using LANCZOS resampling; 4. Pay attention to the image mode during processing, and convert it to RGB if necessary to avoid saving errors; 5. It is recommended to use thumbnail() or custom functions to maintain the image proportions, avoid deformation, and finally save or display the results.
2025-07-26
comment 0
183
How to use PHP to combine AI to generate image. PHP automatically generates art works
Article Introduction：PHP does not directly perform AI image processing, but integrates through APIs, because it is good at web development rather than computing-intensive tasks. API integration can achieve professional division of labor, reduce costs, and improve efficiency; 2. Integrating key technologies include using Guzzle or cURL to send HTTP requests, JSON data encoding and decoding, API key security authentication, asynchronous queue processing time-consuming tasks, robust error handling and retry mechanism, image storage and display; 3. Common challenges include API cost out of control, uncontrollable generation results, poor user experience, security risks and difficult data management. The response strategies are setting user quotas and caches, providing propt guidance and multi-picture selection, asynchronous notifications and progress prompts, key environment variable storage and content audit, and cloud storage.
2025-07-25
comment 0
1094
PHP implements dynamic multi-column responsive picture gallery: random non-repetitive picture loading guide
Article Introduction：This tutorial explains how to use PHP and MySQL to build a dynamic, responsive multi-column gallery with no duplication of images. The core method is to use PHP logic to assign each image to different columns in sequence when obtaining pictures from the database, and finally generate an HTML structure that meets the front-end layout requirements, thereby achieving beautiful and efficient image display.
2025-08-27
comment 0
412
How to create a CSS-only image lightbox?
Article Introduction：To create a pure CSS image light box, you need to use the:target pseudo-class to control the display; 1. Each thumbnail link points to the light box element with a unique ID; 2. The light box is hidden by default, and the flex is displayed in flex when the target matches and centers the large image; 3. Click the close link (href="#") to return to the top of the page and hide the light box; 4. You can add fade effect and visual closing buttons through CSS; this solution does not require JavaScript, but lacks keyboard support and scroll locking functions, which are suitable for lightweight static websites.
2025-08-03
comment 0
727
Create vector effects of JPG images using PHP and Imagefilter
Article Introduction：This article will explain how to use PHP's imagefilter function to convert a JPG image into a black and white image with vector graphics effects. We will demonstrate through sample code how to achieve grayscale and enhance contrast to achieve a vector-like visual effect. This tutorial is for developers who want to use PHP to simply process images and generate images with specific styles.
2025-08-05
comment 0
218
How to implement autoloading for classes in PHP?
Article Introduction：Use spl_autoload_register() to automatically load PHP class files to avoid manual import; it is recommended to use Composer to implement the PSR-4 standard, map directories through namespace, such as App\Models\User corresponding to src/Models/User.php, run composerdump-autoload to generate automatic loading files, and then introduce vendor/autoload.php.
2025-09-06
comment 0
750
What is the autoload section in composer.json?
Article Introduction：Composer.json's autoload configuration is used to automatically load PHP classes, avoiding manual inclusion of files. Use the PSR-4 standard to map the namespace to a directory, such as "App\":"src/" means that the class under the App namespace is located in the src/ directory; classmap is used to scan specific directories to generate class maps, suitable for legacy code without namespace; files are used to load a specified file each time, suitable for function or constant definition files; after modifying the configuration, you need to run composerdump-autoload to generate an automatic loader, which can be used in the production environment --optimize or --classmap-
2025-06-12
comment 0
642
How do I create a new model in Yii?
Article Introduction：There are two main ways to create models in the Yii framework: 1. Use Gii to automatically generate models, and you can generate model classes and CRUD code by enabling Gii tools and accessing its interface to enter table names and class names; 2. Create a model file manually, create a new PHP file in models/ directory and define a class inherited from yii\db\ActiveRecord, and implement tableName(), rules(), attributeLabels() and other methods; in addition, you need to pay attention to the model naming specifications, automatic filling fields, model locations, and the difference between AR and non-AR models, and choose the appropriate method according to actual needs.
2025-07-14
comment 0
383
How do I configure classmap autoloading in my composer.json file?
Article Introduction：To configure the automatic loading of Composer's classmap, first use the "classmap" key under "autoload" in composer.json to specify the directory or file. For example: {"autoload":{"classmap":["lib/","database/models/"]}}, Composer will scan the .php file in these paths and generate class maps. You can also specify a single file such as legacy_class.php. renew
2025-07-14
comment 0
773
php get all dates between two dates
Article Introduction：To get all dates between two dates, it is not difficult to implement with PHP. Just pay attention to the time format and loop logic, and it can be easily done. Generate date list using the DateTime class PHP's built-in DateTime class is a good tool for handling dates. We can use it to iterate through every day between the start date and the end date. functiongetDatesBetween($start,$end){$dates=[];$current=newDateTime($start);$end=newDateTime($end);whi
2025-07-06
comment 0
413
Imagick vs GD
Article Introduction：Key Points
GD and ImageMagick are both popular PHP image processing libraries. GD is more widely used and ImageMagick is more powerful.
In terms of performance, there is no absolute advantage or disadvantage between the two, and the speed depends on the specific application scenario.
The encoding styles are significant. GD adopts procedural programming, and ImageMagick supports object-oriented programming through the Imagick class.
In addition to these two libraries, there are other options, such as cloud image processing platforms or components that have been integrated into the application.
introduction
In PHP applications, if you need to create thumbnails, apply image filters, or perform other image conversions, you need to use the image processing library. Usually, you'll choose GD or ImageMagick. But which library
2025-02-22
comment 0
1347
What are the different autoloading strategies supported by Composer (PSR-4, classmap, files)?
Article Introduction：Composer's automatic loading strategies are mainly three: PSR-4, classmap and files. 1. PSR-4 is suitable for modern PHP projects that follow namespace specifications. It automatically loads by mapping namespaces to directories, supports subdirectories and does not need to list files manually; 2. classmap is used to load classes that do not comply with PSR-4 naming specifications, such as legacy code or multi-class files. Composer will scan the mapping table of the specified directory to generate class names to paths, and needs to run composerdump-autoload after adding or renaming the class; 3. files are used to explicitly include PHP files that need to be loaded unconditionally at each request, suitable for defining global functions,
2025-08-12
comment 0
244
How to Create a PDF from Multiple Images?
Article Introduction：On Windows, rename and sort the pictures and select print them as PDFs through the Photos application, or use Paint to paste and save them as PDFs one by one; 2. On macOS, use the Preview application to open multiple pictures, adjust the thumbnail order and export them as PDFs; 3. Use online tools such as ILovePDF, Smallpdf or Adobe Express to upload pictures, drag and adjust the order, merge and convert and download PDFs; 4. Select pictures through GooglePhotos on the mobile phone, click Share → Print → Save as PDF to generate a single page and single image PDF file, but it cannot be reordered. The easiest method depends on the equipment and usage habits. It is recommended to arrange the charts as needed in advance.
2025-08-23
comment 0
162
Safe and efficiently Serving image files outside DocumentRoot with alias in Apache
Article Introduction：This article will guide you how to configure alias in the Apache web server to safely and efficiently access and display images or other static resources stored outside the documentRoot. By combining Apache configuration and PHP file traversal, you will learn how to map external file paths to accessible URLs and dynamically generate image links, thereby improving the security and flexibility of your website structure.
2025-09-01
comment 0
470
How to create a real-time application with Laravel
Article Introduction：To create a real-time application, you need to configure Laravel broadcasting and integrate WebSocket tools. The specific steps are as follows: 1. Set BROADCAST_DRIVER=pusher in .env, and install pusher/pusher-php-server package, configure the Pusher options in config/broadcasting.php and PUSHER_APP_ID, KEY, SECRET, and CLUSTER in .env; 2. Use phpartisanmake:event to generate the NewMessagePosted event class to implement the ShouldBroadcast interface.
2025-08-07
comment 0
241
How to write unit tests for WordPress code
Article Introduction：Writing WordPress unit tests requires using PHPUnit and WordPress test suites. 1. Set up the environment: Install PHP and Composer, install PHPUnit through Composer, clone the wordpress-develop repository, configure a dedicated database, and use wpscaffold to generate test files. 2. Understand the test structure: inherit the WP_UnitTestCase class, the test method starts with test_, and use the factory class to create test data to avoid real HTTP requests. 3. Write effective tests: cover normal and boundary situations, verify function behavior, hook triggers, and shortcode output, keep the test independent and focused. 4. Run and debug:
2025-07-25
comment 0
249
