Jquery+thinkphp method of implementing cross-domain Fetch data

In this paper, we describe a method for jquery+thinkphp to fetch data across domains. Share to everyone for your reference, as follows:

Today do a remote fetch data function, remember that jquery can be used for remote crawling Ajax, but not cross-domain. Find a lot of online. But I think it's a comprehensive one, so I now feel a bit complicated by the simple problem, but at least for now it's solved:

The effect of crawling data across domains to the local database and then updating asynchronously

I realized the way: jquery $.post send data to the server background, in the background of the PHP code to perform a remote crawl, stored in the database Ajax return data to the foreground, the front desk with JS to accept data and display.

Remote fetch gets data $ ("#update_ac"). Click (function () {      $username = $ ("#username"). Text ();      $ ("#AC, #rank, #Submit, #solved, #solved2, #solved3"). Ajaxstart (function () {        $ (this). HTML ("<span class=" Loading2 ' >   </span> ");      });      $.post ("update_ac/username/" + $username, {},function ($data) {        json = eval ("(" + $data + ")");        $ ("#Submit"). HTML (json.data.Submit);        $ ("#AC"). HTML (Json.data.AC);        $ ("#solved, #solved2, #solved3"). HTML (json.data.solved);        $ ("#rank"). HTML (Json.data.rank);       }      ), "JSON";});

The jquery code above is still on the four floor of the more clear, tangled my is that the JSON data received

JSON = eval ("(" + $data + ")"); the//eval () function computes a string and executes the JavaScript code in it.

In fact, this is still the foreground, cross-domain crawl is the extension of PHP Simple_html_dom completed (not clear can go to the Internet search, based on the development of PHP5)

Fetch the remote page to the local.

Import ("@.org.simple_html_dom"); in//thinkphp, you have to rename the code downloaded online to simple_html_dom.class.php to the appname\lib\org directory $html = file_ get_html (' http://openoj.awaysoft.com/JudgeOnline/userinfo.php?user= '. $username); Remote Fetch $ret = $html->find (' center ', 0)->plaintext; Return the data.

The code above is just the core code, and there are many more features of the simple_html_dom extension. Get to know it yourself.

The returned data is a string, and the regular expression is used to filter the required data.

It is hoped that this article is helpful to the PHP program design based on thinkphp framework.