Unloading the price price from the .xml file to the site for goods

I upload the goods by ftp to the .xml file, then you need to unload from the file to the site.

In the program, which unloads goods on ftp, put once a day at a certain time unloading.

Automatic unloading from the file .xml to the site, once a day, crowns can be done.

But that the crown in the empty did not work if the file is allowed not to unload on ftp, it is necessary to make the crown check the date of the file, if the date is new than the previous date, then unloads the prices of goods.

The essence is, we unload not goods, and the prices of goods that have already been added to the site, check will be on the article, in the file and on the site the articulation of the goods coincides.

Thats why we check the article and unload prices.

Somehow, you can do better to make the load smaller, so that the script when unloading checked past the date on the file, so that if the price on the goods is the same, then did not unload it.

The task is very simple.