huahuibao/common/services/ImageService.php

<?php

namespace common\services;

use common\components\dirUtil;
use common\components\stringUtil;
use linslin\yii2\curl;
use yii\imagine\Image;

//图片相关接口
class ImageService
{
	
	//生成头像
	public static function generateAvatar($merchantId, $url)
	{
		$month = date("Ym");
		$date = date("d");
		$path = dirUtil::getImgDir();
		$middle = "/uploads/weixin/avatar/{$merchantId}/{$month}/{$date}/";
		if (!file_exists($path . $middle)) {
			mkdir($path . $middle, 0777, true);
		}
		$middleName = stringUtil::uniqueFileName();
		$name = $middleName . '.jpg';
		$fullFileName = $path . $middle . $name;
		$fileName = $middle . $name;
		$curl = new curl\Curl();
		$result = $curl->get($url);
		
		$fp = @fopen($fullFileName, 'a');
		fwrite($fp, $result);
		fclose($fp);
		
		$imgInfo = getimagesize($fullFileName);
		if (empty($imgInfo) || isset($imgInfo[0]) == false) {
			return '';
		}
		$width = $imgInfo[0];
		$height = $imgInfo[1];

		//生成小图 200px
		$smallWidth = 200;
		$smallHeight = ceil((200 * $height) / $width);
		if ($width <= 200) {
			$smallWidth = $width;
			$smallHeight = $height;
		}
		$smallFullPathFile = $path . $middle . $middleName . '_small.jpg';
		Image::thumbnail($fullFileName, $smallWidth, $smallHeight)->save($smallFullPathFile, ['quality' => 100]);
		return $fileName;
	}
	
}