先composer下载shopblocks/php-ico

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${content}nbsp;composer require shopblocks/php-ico
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Using version dev-master for shopblocks/php-ico
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./composer.json has been updated
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Loading composer repositories with package information
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Updating dependencies (including require-dev)
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Package operations: 1 install, 0 updates, 0 removals
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  - Installing shopblocks/php-ico (dev-master 91f7213): Cloning 91f721392c from cache
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Writing lock file
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Generating autoload files
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use 一下IcoConverter类

use Ossobuffo\PhpIco\IcoConverter;

下面假设已知图片路径PHP代码;

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          $source = ROOT_PATH . 'public' . DS . 'uploads\\'.$info->getSaveName();
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            $destination = ROOT_PATH . 'public/favicon.ico';
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            $dimensions = [[16, 16]];//这里是图标的高和宽，可以生成为多个不同的像素图标
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            $converter = new IcoConverter($source, $dimensions);
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            $converter->saveIco($destination);

如： $dimensions =[[16, 16], [24, 24], [32, 32], [64, 64]];