get dynamic var from external javascript

Question

I have an external file that renders a video on my site using a dynamic URL with a token and an expire date. It looks like this:

https://www.thevideositeurl.com/embed/231231/

I add it to my page this way:

$vid = 231231; 
$url = file_get_contents("https://www.thevideositeurl.com/embed/{$vid}/") 
echo $url ; 

And it then renders the javascript bellow and also some html

<script type="text/javascript">
    var sources = [
                    {
                type:"video/mp4",
                src:"https://cdn.myvenue.com/media/clips/491355/clip_saple_hd.mp4?expire=1525179619&token=1e52da03af581764724c0e2c428a9faa",
                res:"VideoSample",
                label: "VideoSample"
            }
                        ];
    videojs("video", {
                        nativeControlsForTouch: true,
                                    autoplay: false,
                                    controls: true,
                        width:'100%',
            fluid: true,
                        loop: false,
                                    muted: false,
                                    poster: "https://cdn.static.myvenue.com/media/assets/images/image.jpg",

     etc., etc., etc.

The problem is that I just need to get the video URL (remember: it's dynamic):

https://cdn.myvenue.com/media/clips/491355/clip_saple_hd.mp4?expire=1525179619&token=1e52da03af581764724c0e2c428a9faa

Is this possible?

Answer 1

Assuming you want to get to the first object (or maybe you only have one) in your sources array you can get the video url like this;

var videoURL = sources[0].src;

Update // for PHP code, based on a modified version of @Moti's regex

echo $url;
preg_match('/https:\/\/cdn\.myvenue\.com\/[^\"]*/', $url, $matches, PREG_OFFSET_CAPTURE);
$videoURL = ($matches[0][0]);
echo $videoURL;