相关疑难解决方法(0)

我需要的信息是元标记.如何"content"在何时访问元标记的数据property="video"？

HTML:

<meta property="video" content="http://video.com/video33353.mp4" />

我希望我的应用能够将视频上传到Instagram.

Instagram IPhone Hooks提供了如何使用iphone挂钩将照片上传到instagram的信息.我的问题是,是否有人有任何经验,如何完成相同但视频？

我有一个Twitter提要,我可以在推文中找到Instagram网址.

{
    indices: [
        90,
        110
    ],
    url: "http://t.co/kF9EXifn",
    expanded_url: "http://instagr.am/p/QC8hWKL_4K/",
    display_url: "instagr.am/p/QC8hWKL_4K/"
}

我需要的是从该对象获取扩展的URL"http://instagr.am/p/QC8hWKL_4K/",并获得仅仅是图像本身的链接,而不是Instagram网站上的图像.谁知道怎么做？我甚至可以从网址中获取该链接吗？

我正在编写一个url缩短函数,用于我正在学习php的项目,这里是代码(顺便说一下,我认为这global不是一件好事:P):

$alphabet = array(1 => "a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
                "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z",
                "0","1","2","3","4","5","6","7","8","9","_","-");

function shorten($id){
    global $alphabet;
    $shortenedId = "";
    while($id>0){
        $remainder = $id % 64;
        $id = $id / 64;     
        $shortenedId = $alphabet[$remainder].$shortenedId;
    }
    return $shortenedId;
}

该代码取自这篇维基百科文章 并适用于php.我的问题是,当我通过64到功能我得到一个错误的(我的目的)结果的倍数,例如128回报B的是不正确的,它应该是AAA,但时间太长了3位数.

当然我也会开始觉得有些不对劲这段代码,如果我通过1'000'000'000'000因为$id我得到nItOq ...我觉得这是不对的,因为像bit.ly的URL缩短服务返回6如果我使用它的数字ID,我不认为这个算法比他们更好.

那么,有两个问题:

• 你发现上面代码中的任何错误？
• 如何管理64位多重ID？我是否必须忽略它们并转到下一个？