Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Full of Errors. I'd pass

I am an experienced programmer and I wanted to learn PHP, so I got this book. I use Apache 2.2 and PHP 5.2.17. Well, where to begin. Some (many) of the examples on the disk are unlike the ones in the book. Second, the author uses <?...?> to indicate the code that is PHP (to be processed by PHP). When I use that, nothing happens. I have to use <?php (as every refereence on line says). And thirdly some code just doesn't run at all and emits errors. For instance (and there are others), persistence.php: When I run it I get this:Notice: Undefined variable: txtBoxCounter in C:\usr\web\persistence.php on line 14Notice: Undefined variable: hdnCounter in C:\usr\web\persistence.php on line 15There are many more like it. Perhaps if the book were corrected it might be OK to get.