PHP 裁剪圆图片

靳某某。

已于 2022-02-16 17:22:05 修改

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文章标签： php 开发语言后端

于 2021-02-02 16:21:59 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_43926608/article/details/113563756

  public function BcAvatar($url, $id)
    {
        $path = ROOT_PATH . 'public/static/uploads/avatar/';
        $url = $url;
        $w = 110;
        $h = 110; // original size
        $original_path = $url;
        $dest_path = $path . $id . '.png';
        $src = imagecreatefromstring(file_get_contents($original_path));
        $newpic = imagecreatetruecolor($w, $h);
        imagealphablending($newpic, false);
        $transparent = imagecolorallocatealpha($newpic, 0, 0, 0, 127);
        $r = $w / 2;
        for ($x = 0; $x < $w; $x++) {
            for ($y = 0; $y < $h; $y++) {
                $c = imagecolorat($src, $x, $y);
                $_x = $x - $w / 2;
                $_y = $y - $h / 2;
                if ((($_x * $_x) + ($_y * $_y)) < ($r * $r)) {
                    imagesetpixel($newpic, $x, $y, $c);
                } else {
                    imagesetpixel($newpic, $x, $y, $transparent);
                }
            }
        }

        imagesavealpha($newpic, true);
        // header('Content-Type: image/png');
        imagepng($newpic, $dest_path);
        imagedestroy($newpic);
        imagedestroy($src);
        $dest_path = str_replace(ROOT_PATH . "public", "", $dest_path);
        return $dest_path;
    }