<?php namespace common\traits; use Yii;use yii\helpers\FileHelper; /** * 图片旋转处理trait * * @author wangjian * @since 1.0 */class ImageRotate{     /**     * base64图片旋转     * @param $image 需要旋转的base64图片     * @param string $rotate 逆时针旋转角度     * @param false $savePath 保存的图片路径,false返回base64格式     */    public static function base64Rotate($image, $rotate = "90", $savePath = false)    {        if (empty($image)) {            return false;        }        if (preg_match("/^(data:\s*image\/(\w+);base64,)/", $image, $result)) {            $type = $result[2];            //设置临时目录            $temporaryPath = "/tmp/";            $temporaryPath = dirname(Yii::getAlias("@common")) . "/web" . $temporaryPath;            FileHelper::createDirectory($temporaryPath);             //将原图保存到零食目录            $temporaryImage = date("YmdHis") . rand(1000, 9999) . "." . $type;            if (file_put_contents($temporaryPath . $temporaryImage, base64_decode(str_replace($result[1], "", $image)))) {                $newImage = self::rotateImage($temporaryPath . $temporaryImage, $rotate); //旋转图片                //删除临时文件                @unlink($temporaryPath . $temporaryImage);                 ob_start();                if ($savePath === false) { //返回base                    imagepng($newImage);                    $imageString = $result[1] . base64_encode(ob_get_contents());                    @unlink($newImage);                } else {                    $imageString = imagepng($newImage, $savePath);                }                ob_end_clean();                 return $imageString;            }        }         return false;    }     /**     * 本地图片旋转     * @param $image 需要旋转的本地图片     * @param string $rotate 逆时针旋转角度     * @param false $savePath 保存的图片路径,false返回替换原图     */    public static function imageRotate($image, $rotate = "90", $savePath = false)    {        if (empty($image)) {            return false;        }        //旋转图片        $newImage = self::rotateImage($image, $rotate);        ob_start();        if ($savePath === false) {            //替换原图            $url = $image;        } else {            $url = $savePath;        }        $imageString = imagepng($newImage, $url);        ob_end_clean();        return $imageString;    }     /**     * @param $file 需要旋转的图片     * @param $rotate 逆时针旋转角度     */    private static function rotateImage($file, $rotate)    {        $imageSize = getimagesize($file);        $imageSize = explode("/", $imageSize["mime"]);        $type = $imageSize[1];         switch ($type) {            case "png":                $image = imagecreatefrompng($file);                break;            case "jpeg":                $image = imagecreatefromjpeg($file);                break;            case "jpg":                $image = imagecreatefromjpeg($file);                break;            case "gif":                $image = imagecreatefromgif($file);                break;        }        $rotateImage = imagerotate($image, $rotate, 0); //逆时针旋转        //获取旋转后的宽高        $srcWidth = imagesx($rotateImage);        $srcHeight = imagesy($rotateImage);        //创建新图        $newImage = imagecreatetruecolor($srcWidth, $srcHeight);        //分配颜色 + alpha，将颜色填充到新图上        $alpha = imagecolorallocatealpha($newImage, 0, 0, 0, 127);        imagefill($newImage, 0, 0, $alpha);        //将源图拷贝到新图上，并设置在保存 PNG 图像时保存完整的 alpha 通道信息        imagecopyresampled($newImage, $rotateImage, 0, 0, 0, 0, $srcWidth, $srcHeight, $srcWidth, $srcHeight);        imagesavealpha($newImage, true);         return $newImage;    } }

ImageRotate::base64Rotate("base64图片", "旋转角度");

ImageRotate::imageRotate("本地图片地址", "旋转角度", "保存地址");