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<p class=MsoNormal>I have a problem. In Fitzpatrick and Keane p. 161 (and in
the 2007 exam) arrays and records are primarily differentiated by data type. So
the text says: “An array is an indexed collection of elements of the same
type of data”; “A ... record represents a group of different data
elements”.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>But, in PHP, this works:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'><?php
<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'>$pizzaToppings
= array('onion', 'tomato', 'cheese', 'anchovies', 'ham', 'pepperoni', 1.6,
200); <o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'>echo
"<h1>We like $pizzaToppings[5] PIZZA!</h1>";<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'>$num
= $pizzaToppings[6] * $pizzaToppings[7];<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'>echo
$num;<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Courier New"'>?></span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:36.0pt'><o:p> </o:p></p>
<p class=MsoNormal>i.e. the array is storing data of different types and not
storing the numeric data as a string. What am I missing here? I’ve done a
search, but these are the only references I’ve seen that define this as
the main difference. I’ve been labouring under the delusion that an array
lives in volatile memory and disappears once the application halts or
reinitialises and a record is written to disk. I know from the web that I’m
not alone here.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Laurie Savage<o:p></o:p></p>
<p class=MsoNormal>Pascoe Vale Girls College<o:p></o:p></p>
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