please consider:
.....
<item>
<cat>category1</cat>
<desc>item1_cat1</desc>
</item>
<item>
<cat>category1</cat>
<desc>item2_cat1</desc>
</item>
<item>
<cat>category2</cat>
<desc>item1_cat2</desc>
</item>
<item>
<cat>category3</cat>
<desc>item1_cat3</desc>
</item>
<item>
<cat>category3</cat>
<desc>item2_cat3</desc>
</item>
.....would it be possible to generate a list only of those items with property 'category1' and provide hyperlinks to display those items with properties 'category2' and 'category3', respectively?
an outline for approach may suffice, but if this is out of the realm of magic parser support, please feel free to direct me elsewhere.
thanks,
andras.
Hi andras,
Sure - the basic trick here is to selectively show records based on the value of 1 (or more) fields, and then propagate a value through in the URL in your hyperlinks which is further used to control what is displayed - perhaps even using a separate myRecordHandler() function. For example:
<?php$categories = array();
function myCategoryRecordHandler($record)
{
global $categories;
// using the category as the key of an associative array
// means we only get unique category values!
$categories[$record["CAT"]] = 1;
}
function myItemRecordHandler($record)
{
if ($record["CAT"] <> $_GET["cat"]) return;
print "<p>".$item["DESC"]."</p>";
}
if ($_GET["cat"])
{
MagicParser_parse("items.xml","myItemRecordHandler","xml|ITEMS/ITEM/");
}
else
{
MagicParser_parse("items.xml","myCategoryRecordHandler","xml|ITEMS/ITEM/");
ksort($categories); // sort categories into alphabetical order
foreach($categories as $category => $v)
{
print "<p><a href='?cat=".urlencode($category)."'>".$category."</a></p>";
}
}
?>
Hope this helps!
Cheers,
David.