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Re: [vox-tech] PHP / CURL
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Re: [vox-tech] PHP / CURL



On Sep 1, 2006, at 10:35 AM, serendipitu serendipitu wrote:

I need to READ some data from that page without manually loging in every 24 hours.
PHP/curl makes this pretty easy (depending on how much energy the site developers have put into trying to prevent screen-scraping). Also, any language that has a curl implementation can also do this (PERL is one that comes to mind).

You need a pretty strong understanding of PHP and a basic understudying of how HTTP works. You'll need a webserver that runs PHP or a local machine with the PHP command line interface installed. Then you'll need a script. That script will take a series of steps that each represent a login, a link click, a form submission, or some kind of user interaction with a website.

The process basically works like this:

First you call curl_init() to get things started.

You need to call curl_setopt() any number of times to define what type of call you're going to make (in this case a series of HTTP transactions). These curl_setopt() calls are very similar to the command line switches you'd throw at the command line version of curl.

Then you finish up with a curl_exec() and a curl_close().

It took me a lot of ready and trial and error to figure this all out. I'd start here: http://www.php.net/manual/en/ref.curl.php

Every site is different, and it's difficult to tell you what to do without having a half.com account.

Dave
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