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Informations about the package image-compression
PHP JPEG Encoder Project
该项目是基于 libwebp , mozjpeg 实现的。PHP的 gd 库,或者是 imagick 压缩比、性能都不如前者。
如果需要转化成异步模式则需要 Swoole 提供的 Hook 功能将命令转为 CLI 模式。
运行环境
- Linux,OS X
- PHP 7.2+
- Swoole 4.4+
安装
使用
方法
setQuality(int) 设置压缩质量。0-95 默认75
enableAsync() 是否开启异步。依赖 Swoole 提供的 Hook 功能
input(string $image,string $outfile = '') 输入一张图片。第二个参数为输出图片名称,不需要带后缀,不传则使用原名。也可以输入网络图片地址。
inputs(array $images) 输入图片数组。参数说明参考 input()
crop( int $x , int $y , int $width , int $height ) 图片裁切。 x 轴位置 ,y 轴位置 , width 图片宽度 ,height 图片高度
resize( int $width , int $height ) 图片缩放( mozjpeg 不支持), width 图片宽度 ,height 图片高度
output() 输出图片
例子
效果对比
此对比只是针对同一图片而言。不同的图片压缩比会有差异。只能是做一个相对的对比。
| 原图 | Webp | mozjpeg | imagick(jpg) | imagick(webp) |
|---|---|---|---|---|
 |
 |
 |
 |
 |
| 压缩比 | 85% | 83% | 52% | 72% |
兼容
License
MIT
