如何在PHP中刮取JavaScript值

Question

I’m new to PHP and coding in general and I can’t figure this out. I’m trying to get the number of kills from this profile page.

At the moment, the string I am trying to get is:

29362

When I view the page source, this number is nowhere to be seen.

When I use inspect element, however, I find:

<td class="num">29362</td>

How can I get the content shown in inspect element instead of the content shown by viewing the page source?

Answer 1

In using a tool like Firebug for Firefox, or the inspector for Safari and Chrome, you can see that at page load a series of AJAX requests are made for data. Though I didn't dig through all of the data returned by those requests, I do see the data you're looking for in at least one of them:

http://uberstrike.com/profile/all_stats/631163 

So at page load JavaScript makes a series of AJAX requests back to the server to get all the data, then it manipulates the DOM to insert it all into the view.

If you wanted, your PHP could directly request the URL I pasted above and json_decode the response. This would produce a data structure for you to use which includes that number in the kills_all_time property.

Quick and dirty example:

<?php
$data_url = 'http://uberstrike.com/profile/all_stats/631163';

$serialized_data = file_get_contents($data_url);

$data = json_decode($serialized_data, true);

var_dump($data['kills_all_time']);