经过STMP发邮件，这段代码错在哪

 "smtp.gmail.com",
    "port" => "465",
    "username" => "", //用户名
    "password" => "", //密码
    "from" => "", //发件人e-mail
    "to" => "", //收件人e-mail
    "subject" => "测试一下标题",
    "body" => "测试一下内容" 
    );

$CRLF = "\r\n";
$test = "";

$header = array( 'Return-path' => '<' . $smtp['from'] . '>',
    'Date' => date( 'r' ),
    'From' => '<' . $smtp['from'] . '>',
    'MIME-Version' => '1.0',
    'Subject' => inlineCode( $smtp['subject'] ),
    'To' => $smtp['to'],
    'Content-Type' => 'text/html; charset=UTF-8; format=flowed',
    'Content-Transfer-Encoding' => 'base64' 
    );

$data = buildHeader( $header ) . $CRLF . chunk_split( base64_encode( $smtp['body'] ) );
$content = "EHLO " . $smtp["url"] . $CRLF; // 先得hello一下
$content .= "AUTH LOGIN" . $CRLF . base64_encode( $smtp["username"] ) . $CRLF . base64_encode( $smtp["password"] ) . $CRLF; // 验证登陆
$content .= "MAIL FROM:" . $smtp["from"] . $CRLF; // 发件地址
$content .= "RCPT TO:" . $smtp["to"] . $CRLF; // 收件地址
$content .= "DATA" . $CRLF . $data . $CRLF . "." . $CRLF; // 发送内容
$content .= "QUIT" . $CRLF; // 退出

$curl = curl_init();
curl_setopt( $curl, CURLOPT_URL, $smtp['url'] );
curl_setopt( $curl, CURLOPT_PORT, $smtp['port'] );
curl_setopt( $curl, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; .NET CLR 3.0.4506.2152)' );
curl_setopt( $curl, CURLOPT_TIMEOUT, 10 );
curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true ); // curl接收返回数据
curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, false );
curl_setopt( $curl, CURLOPT_SSL_VERIFYHOST, false );
curl_setopt( $curl, CURLOPT_CUSTOMREQUEST, $content );

$test = curl_exec( $curl );

var_dump( $test );

curl_close( $curl );

function inlineCode( $str ) {
    $str = trim( $str );
    return $str ? '=?UTF-8?B?' . base64_encode( $str ) . '?= ' : '';
} 
function buildHeader( $headers ) {
    $ret = '';
    foreach( $headers as $k => $v ) {
        $ret .= $k . ': ' . $v . "\n";
    } 
    return $ret;
} 

?>

                                
                                debug = true; //是否开启调试,只在测试程序时使用，正式使用时请将此行注释
                                $to = "收件人的邮件地址"; //收件人
                                //准备使用的邮箱 
                                $subject = "咨询";
                                $body=" 咨询人:{$firstname}.{$familyname}

                                 咨询人名字拼音:{$firstnamepy}.{$familynamepy}

                                 咨询人性别:{$sex}
            
                                 咨询种类:{$zixun1}

                                 咨询内容:{$zixun}

                                 公司名(法人)：{$faren}

                                 联络地区:{$address}

                                 电话号码:{$phone}

                                 电子邮件:{$email}"; 
                             
                             //sendmail($to,$sender,$subject,$body,$mailtype);
                        ?>