上传图片功能
最近在弄上传图片的功能
我说下我的思路:将用户上传的文件保存到服务器上,获取图片路径加名字 再用img 显示出来
怎么过滤一起其他文件(.exe,.pdf,.txt.......)
回复讨论(解决方案)
获取mine类型。
strtolower(substr(strrchr($filename, '.'), 1, 10));
获取后缀名,判断
getimagesize() 函数将测定任何 GIF,JPG,PNG,SWF,SWC,PSD,TIFF,BMP,IFF,JP2,JPX,JB2,JPC,XBM 或 WBMP 图像文件的大小并返回图像的尺寸以及文件类型
还是这样的结果
Array( [0] => 286 [1] => 314 [2] => 2 [3] => width="286" height="314" [bits] => 8 [channels] => 3 [mime] => image/jpeg)
当 getimagesize() 返回空时就表示不是图片文件
上穿的时候,判断一下文件的扩展名,不是你想要的就不要上传
用户上传图片时,图片的长宽是不知道的,而我放图片框长宽又是固定的,这个要怎么解决?
(设置img的长度,小的图片被放大,大的被缩小,看起来怪怪的)
用户上传图片时,图片的长宽是不知道的,而我放图片框长宽又是固定的,这个要怎么解决?
(设置img的长度,小的图片被放大,大的被缩小,看起来怪怪的)
上传图片后,可以对图片做一个压缩处理。压缩到尺寸和你显示的一样就可以。

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,

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 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...

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

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

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�...

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
