图片转base64

<?php

/**
 * Describe: 图片转base64
 * 使用方法: php imgtobase64.php path=/www/projects/test/20220623171931.png
 * Author: ZhaoGuibin
 * Date: 2022-06-23
 */
class ImgToBase64
{
    static private $instance;

    private function __construct()
    {
    }

    static public function getInstance()
    {
        if (!self::$instance instanceof self) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * 获取命令行输入参数
     * @return array
     */
    function getClientArgs()
    {
        global $argv;
        array_shift($argv);
        $args = array();
        array_walk($argv, function ($v, $k) use (&$args) {
            @list($key, $value) = @explode('=', $v);
            $args[$key] = $value;
        });
        return $args;
    }

    /**
     * 图片转为base64
     * @param $img_path
     * @return string|void
     */
    function imgToBase64($img_path = '')
    {
        $img = isset($img_path['path']) ? $img_path['path'] : '';
        if (!$img) {
            return '图片不存在或图片路径不正确';
        }

        if ($fp = fopen($img, "rb", 0)) {
            $image = fread($fp, filesize($img));
            fclose($fp);

            $base64 = chunk_split(base64_encode($image));
            // 输出
            $encode = 'data:image/jpg/png/gif;base64,' . $base64;
            echo $encode;
        }
    }

    private function __clone()
    {
    }
}

$img_path = ImgToBase64::getInstance()->getClientArgs();
ImgToBase64::getInstance()->imgToBase64($img_path);