php字符串搜索 - 抓取特定网址

Question

I have this string that may contain some urls that I need to grab. For instance, if the user does:

www.youtube ...

or

www.vimeo ...

or

http://www.youtube ...

or

HttP://WwW.viMeo

I need to grab it (until he finds a space perhaps). and store it on a already created array.

The need is to separate the vimeo links from the youtube ones and place each of those on the appropriate video object.

I'm not sure if this is possible, I mean, if the URL coming from the browser could be used to be placed on a predefined video object. If it is, then this is the way to go (so I believe).

If all this is feasible, can I have your help in order to build such a rule?

Thanks in advance

Answer 1

This matches the links you need, and store them in a 2D array by site name:

$video_links = array();
if (preg_match_all("'(http://)?(www[.])?(youtube|vimeo)[^\s]+'is",$str,$n)) {
    foreach ($n[3] as $key => $site)
    {
        $video_links[$site][] = $n[0][$key];
    }
}

What does this do?

This match separates 3 + 1 parts of the needed urls in $str, which is your string:

• Part 0: the whole match (your video link)
• Part 1: http:// (optional)
• Part 2: www. (optional)
• Part 3: vimeo or youtube

preg_match_all returns a 2D array with the above part numbers at first level, and every match inside is the part of each match. So you iterate part 3 of the match ($n[3]), and use the array keys to reference part 0 ($n[0][$key]), and arrange them in a nice 2D array like this:

$video_links = array (
    'vimeo' => array (
        0 => 'vimeo link 1',
        1 => 'vimeo link 2',
        // ...
    ),
    'youtube' => array (
        0 => 'youtube link 1',
        1 => 'youtube link 2',
        // ...
    )
);