example-auto-version/api/app/common/util/DonationCert.php

<?php
namespace app\common\util;
use app\common\service\OrderService;
use Carbon\Carbon;
class DonationCert
{
    public static function certByOrder($order)
    {
        $carbon = Carbon::parse($order->pay_time);
        $date = $carbon->isoFormat('YYYY年MM月DD日');
        $position = OrderService::orderPositionInDate($order);
        $certNo = $carbon->isoFormat('YYYYMMDD') . sprintf('%04d', $position);
        return self::cert($order->user_name, $order->money, $date, $certNo);
    }

    public static function cert($name, $money, $date, $certNo)
    {
        // 创建一张新的图片
        $image = imagecreatefromjpeg('image.jpg');

        // 设置文字颜色和字体大小
        $gray = imagecolorallocate($image, 102, 102, 102);
        $black = imagecolorallocate($image, 46, 46, 46);
        $green = imagecolorallocate($image, 7, 193, 96);

        $font = 'PingFang.ttf';
        $semibold = 'PingFangSemiBold.ttf';

        // 姓名
        $x = 90; // 文本在图片中的x坐标
        $y = 550; // 文本在图片中的y坐标
        imagettftext($image, 36, 0, $x, $y, $black, $semibold, $name);

        // 谢谢你
        $thx = '谢谢你：';
        $x = $x + 12 + strlen($name) * 15;
        imagettftext($image, 18, 0, $x, $y, $gray, $font, $thx);

        // 感谢语金额
        $suffix = 2;
        if ($money >= 10 * 10000 && $money < 100 * 10000) {
            $suffix = 1;
        } elseif ($money >= 100 * 10000) {
            $suffix = 0;
        }
        $money = number_format($money, $suffix, '.', '');
        $x = 265;
        $y = 625;
        imagettftext($image, 28, 0, $x, $y, $green, $semibold, $money);

        // 下方列表
        $formX = 258;
        $formY = 870;
        $gap = 86; //中间间隔

        // 证书编号
        imagettftext($image, 24, 0, $formX, $formY, $black, $font, $certNo);
        // 捐赠金额
        $formY += $gap;
        imagettftext($image, 28, 0, $formX, $formY, $green, $semibold, $money);
        // 发放时间
        $formY += $gap;
        imagettftext($image, 24, 0, $formX, $formY, $black, $font, $date);


        // 输出图片
        $name = md5(strtotime('now') . random_int(100000, 999999)) . '.png';
        $dir = public_path() . "storage/";
        if (!file_exists($dir)) {
            mkdir($dir, 0777, true);
        }
        $path = $dir . $name;
        imagepng($image, $path);
        $url = self::get_domain() . dirname($_SERVER['SCRIPT_NAME']) . '/' . $name;
        $url = str_replace('\\', '/', $url);
        $url = str_replace('public', 'public/storage', $url);

        // 释放内存
        imagedestroy($image);

        return ['url' => $url];
    }

    /**
     * 获取当前网站的域名地址
     * 
     * @return string 域名地址
     */
    protected static function get_domain()
    {
        $sys_protocal = isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://';
        return $sys_protocal . (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '');
    }
}