Missing code?

[vivosmith]

Hello,
I was working on some code, when I ran into this: foreach ($products as $product). One problem, it was not defined. How could this be? Here is the book I got it from: http://english-common.googlecode.com/svn-history/r100/trunk/huyliem/01-Murach.PHP.MySQL/Murach.PHP.and.MySQL.Nov.2010.pdf . It is on 161-163. I don't understand where the $product came from. And one more thing. Doe fetch() turn the mysql variables into arrays? Thanks

[LastMitch]

@vivosmith

I was working on some code, when I ran into this: foreach ($products as $product). One problem, it was not defined. How could this be?

The link you provided didn't work

so for your example: foreach ($products as $product)

You can used this:

<?php
$products = array(1, 2, 3, 4);
foreach ($products as &$product) {
    $product = $product * 2;
}
unset($product); 
?>

If you really want to learn and know how that example works then read this:

http://php.net/manual/en/control-structures.foreach.php

This will give you an idea on how that foreach() function works.

[Dani]

Basically you're saying to loop through the $products array, and for each element in the array, temporarily make it accessible via the $product variable. Do something with this $product variable, and then loop. This way you have access to a single variable name that you can keep reusing for each element in the array. Kinda sorta. I'm bad at explaining.

[vivosmith]

here is the direct link: http://code.google.com/p/english-common/source/browse/trunk/huyliem/01-Murach.PHP.MySQL/Murach.PHP.and.MySQL.Nov.2010.pdf?r=100
THe problem is $product is not previously defined. I understand how it works, but it is not defined.

[pritaeas]

This file may be included into another script, where the variable has a value.

[vivosmith]

I figured it out. I believe the foreach statement is creating an array from the previous variable. Am I correcting in saying it goes from variable to array, or is it the opposites?

[vivosmith]

I see. The catergories variable is a query, and the array variable category stores the results. Thanks