Convert Image To base64

接到一個 case 需要把圖片轉為 base64 傳出，順手寫了個 class 做掉這件事。

<?php

class ImageToBase64
{
    public function encode64($source = null, $fileName = null)
    {
        $source = file_get_contents($source);
        $type = pathinfo($fileName, PATHINFO_EXTENSION);
        $content = 'data:image/' . $type . ';base64,' . base64_encode($source);

        return $content;
    }

    public function decode64($source = null)
    {
        $content = null;

        if (preg_match('/data:([^;]*);base64,(.*)/', $source, $matches)) {
            header('Content-Type: '.$matches[1]);
            $content = base64_decode($matches[2]);
        }

        return $content;
    }
}