[PHP] why doesn't $books[$val][display] show the value

[Peter J. Schoenster]

Hi,

I've got an array like the following:

        $books = array(
                "1572316217" => array(
                        category        => 'tech',
                        display         => 'Steve McConnell\'s Software Project 
Survival Guide',
                        href            => 
'http://www.amazon.com/exec/obidos/ASIN/1572316217/readbrazil07-20',
                        title           => 'Steve McConnell\'s Software Project 
Survival Guide',
                        width           => '71',
                        height          => '90',
                        src                     => 
'/images/1572316217.01.TZZZZZZZ.jpg',
                        vspace          => '3',
                        alt                     => 'Steve McConnell\'s Software 
Project Survival Guide',
                        hspace          => '3',
                        comments        => "",
                ),

$books     = $AfiliateLinkBuilder->get_books();
srand ((float) microtime() * 10000000);
$rand_keys = array_rand ($books, 2);

while (list ($key, $val) = each ($rand_keys)) {  
        $display = $books[$val][display];

Why do I have to do this:
        $display = $books[$val][display];

rather than 

$html.= " Yaddda yadda $books[$val][display]";

 $books[$val][display] in the double quotes only shows display. I 
thought that within double quotes I don't use double quotes for 
elements ... ? What's the rule on this. I could do the above in Perl.

Thanks,

Peter


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