通过curl发送图像失败

curl无法将照片发送到远程API。

远程服务器在现场接收直接提交时工作正常。文件上传文件名为photos[] (api运行laravel 5，禁用csrf)。

首先我这样做:

foreach ( $carRaw[ 'imgs' ] as $k => $v) {
    $tmpFile = tempnam( '/tmp/curlfiles', 'autoge-' );
    file_put_contents(
        $tmpFile,
        file_get_contents(
            'http://' . $v[ 'ipt' ] . '/im/im-' . $v[ 'ikey' ]
        )
    );
    $car[ 'photos' ][ $k ] = new 'CURLFile( $tmpFile, 'image/png', $v[ 'ikey' ] );
}

After my send method:

    $ch = curl_init();
    curl_setopt( $ch, CURLOPT_URL, $addCarUrl );
    curl_setopt( $ch, CURLOPT_POST, true );
    curl_setopt( $ch, CURLOPT_POSTFIELDS, http_build_query( $car ) );
    curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
    curl_setopt( $ch, CURLOPT_COOKIEFILE, $cookiePath );
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
    curl_setopt( $ch, CURLOPT_VERBOSE, false );
    $response = curl_exec( $ch );
    curl_close( $ch );
    $this->info( $response );
    return $response; // 1 or 0

问题是所有的字段都被发送和保存，但从来没有图像。我一定是发错了方向!

帮忙吗?