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();
        $middle = "/wx/avatar/{$merchantId}/{$month}/{$date}/";
        if (!file_exists($path . $middle)) {
            mkdir($path . $middle, 0777, true);
        }
        $rand = stringUtil::uniqueFileName();
        $middleName = md5($rand . $url);
        $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;
    }

}