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[2003-09-30] A Dynamic PHP Thumbnail Gallery Part 3
In my last column, I introduced the resize() function and a simple cache system is used to create and keep updated the thumbnails for all the images that are to be displayed in the picture gallery. This week, I'll introduce the second half of the AutoGallery's management system by discussing the checkup() member function which handles the removal of thumbnails which are no longer necessary.
[2003-09-18] Optimizing Dynamic Pages - Part II
The Widget Queen Revisited
You have the world's finest collection of widgets. You created the world's best widget website. You have no traffic.
You checked in the search engines and find that your site does not appear at all, even though all your competitors' sites do. Perhaps the search engine robots cannot get to your pages to index them.
Search Engine Robots
Search engine robots are simple creatures. They can "read" text to add to their databases, and they can follow "normal" links--those links that are coded to look like
<a href="bluewidgets.html">blue widgets </a>
or the slight variation
<a href="bluewidgets.html ><img src="bluewidget.gif" ></a>
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