php裁剪图片中的指定位置区域,该怎么解决
php裁剪图片中的指定位置区域
想要裁剪的黄框区域内图片
裁剪后出错的图片
根据X Y指定坐标,截取图片指定宽高图片,现在用那个图片函数给出错了, 根据x y轴起点是对的, 但它把剩下的区域全部缩小,然后不足又加了黑边,导致图片变形了。
list($width,$heght,$type,$attr) = getimagesize($imgurl);
$thisimage = imagecreatetruecolor($new_w, $new_h);
$background = imagecolorallocate($thisimage, 255, 255, 255);
imagefilledrectangle($thisimage, 0, 0, $new_w, $new_h, $background);
$oldimg = imagecreatefromjpeg($imgurl);
imagecopyresampled($thisimage, $oldimg, 0, 0, $src_x, $src_y, $new_w, $new_h, $width, $heght);
header("Content-type: image/jpeg");
imagejpeg($thisimage);
请教下各位前辈,这个图片该怎么截取才能得到黄框中想要的图片呢
------解决方案--------------------
$thisimage = imagecreatetruecolor($new_w, $new_h);// $new_w, $new_h 为裁剪后的图片宽高
$oldimg = imagecreatefromjpeg($imgurl); // 载入原始图片
imagecopy($thisimage, $oldimg, 0, 0, $src_x, $src_y, $new_w, $new_h); //$src_y, $new_w 为原图中裁剪区域的左上角坐标
------解决方案--------------------
这个你图片的高度,宽度设置错了吧
剪切是没有问题的
------解决方案--------------------
参数是不是写错了啊?
------解决方案--------------------

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

Alipay PHP...

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...
