Composer安装yii2-imagine 压缩,剪切,旋转,水印

具体的composer安装方法在本站可以搜索"composer", 这里要说的是安装yii2-imagine
composer中国镜像, apache和php.ini打开ssl是必须的,

安装:
1.DOS命令切换到项目目录, 然后直接执行下面命令

composer require --prefer-dist yiisoft/yii2-imagine

执行命令如下:

You are running Composer with SSL/TLS protection disabled.
Using version ^2.1 for yiisoft/yii2-imagine
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Installing imagine/imagine (v0.6.3)
    Downloading: 100%

  - Installing yiisoft/yii2-imagine (2.1.0)
    Downloading: 100%

imagine/imagine suggests installing ext-imagick (to use the Imagick implementati
on)
imagine/imagine suggests installing ext-gmagick (to use the Gmagick implementati
on)
Writing lock file
Generating autoload files

2.查看是否安装成功, 安装了两个目录分别是

vendor/imagine
vendor/yiisoft/yii2-imagine

使用
引入

use yii\imagine\Image;

实例化

$imagine = new Image();

使用方法

//压缩
Image::thumbnail('@webroot/img/test-image.jpg', 120, 120)->save(Yii::getAlias('@webroot/img/thumb-test-image.jpg'), ['quality' => 100]);
echo Yii::getAlias('@webroot/img/thumb-test-image.jpg');

//参数说明:
$filename 文件的路径
$width 缩略图的宽
$height 缩略图的高
$mode 模式(默认THUMBNAIL_OUTBOUN)
    \Imagine\Image\ManipulatorInterface::THUMBNAIL_OUTBOUN 裁剪模式
    \Imagine\Image\ManipulatorInterface::THUMBNAIL_INSET 填充模式

//剪切
$result =  Image::crop('@webroot/img/test-image.jpg', 200, 200,[100,100])->save(Yii::getAlias('@webroot/img/thumb-test-crop.jpg'));

//参数说明:
$filename 文件的路径
$width 裁剪的宽度
$height 裁剪的高度
$start 裁剪的x,y 点

//旋转
Image::frame('@webroot/img/test-image.jpg', 5, '666', 0)->rotate(-8)->save(Yii::getAlias('@webroot/img/thumb-test-frame.jpg'), ['quality' => 100]);

//水印
Image::watermark('@webroot/img/test-image.jpg', '@webroot/img/watermark.jpg', [10,10])->save(Yii::getAlias('@webroot/img/thumb-test-watermark.jpg'), ['quality' => 100]);

//参数说明：
$filename 文件的路径
$watermarkFilename 水印图片
$start 裁剪点(x,y)

//文字水印
Image::text('@webroot/img/test-image.jpg', 'hello world', '@webroot/img/symbol.ttf',[100,100],['color'=>'000000','size'=>50])->save(Yii::getAlias('@webroot/img/thumb-test-text.jpg'), ['quality' => 100]);