php文件base64格式之间互转

        $www_Patch=$_SERVER['DOCUMENT_ROOT'];
        $filename = '/common/images/zzfw.png';
        $filepath = $www_Patch . $filename;
 
        $result = file_get_contents($filepath);
        $base64_image ="data:image/jpeg;base64,".base64_encode($result); //文件转base64
        return base64_decode($base64_image); //base64转文件
        return $base64_image;
        return $result;