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Question

I came across a situation which looks difficult as I am newbie. I searched on google but could not get any idea about it. There is a site which provide users a facility to search for doctors in their area/state etc.

There may be a situation when number of doctors addresses can be increased on that site in any state. How can I know this new doctor added in that site, without visiting and searching in that site.

In other words. Suppose you have a site. If you change your site content. How can I know that you change your site contents.

I want to syncs the records with theirs, either daily or weekly because their databases changes.

Answer 1

you can use cURL in PHP.

a basic example of usage :

<?php

    $ch = curl_init("http://www.example.com/");
    $fp = fopen("example_homepage.txt", "w");

    curl_setopt($ch, CURLOPT_FILE, $fp);
    curl_setopt($ch, CURLOPT_HEADER, 0);

    curl_exec($ch);
    curl_close($ch);
    fclose($fp);
?>

You can also define a whole range of parameters, so it's easy to mimic a POST or GET - then you run the script regularly as a CRON job, save the results each time to a new file and compare it to the old one with PHP