test.xml:
<?xml version="1.0"?>
<props>
<prop>
<state statename="Mississippi">
<info>
<code>a1</code>
<location>Jackson</location>
</info>
<info>
<code>d2</code>
<location>Gulfport</location>
</info>
<info>
<code>g6</code>
<location>Hattiesburg</location>
</info>
</state>
<state statename="Texas">
<info>
<code>i9</code>
<location>Dallas</location>
</info>
<info>
<code>a7</code>
<location>Austin</location>
</info>
</state>
<state statename="Maryland">
<info>
<code>s5</code>
<location>Mount Laurel</location>
</info>
<info>
<code>f0</code>
<location>Baltimore</location>
</info>
<info>
<code>h4</code>
<location>Annapolis</location>
</info>
</state>
</prop>
</props>
test.php
// start the sortCities
function sortCities($a, $b){
return strcmp($a->location, $b->location);
}
// start the sortStates
function sortStates($t1, $t2) {
return strcmp($t1['statename'], $t2['statename']);
}
$props = simplexml_load_file('
test.xml');
foreach ($props->prop as $prop) {
$sortedStates = array();
foreach($prop->state as $states) {
$sortedStates[] = $states;
}
usort($sortedStates, "sortStates"); // finish the sortStates
/* --- */
echo '<pre>'."\n";
print_r($sortedStates);
echo '</pre>'."\n";
/* --- */
foreach ($prop->children() as $stateattr) { // this doesn't do it
//foreach($sortedStates as $hotel => @attributes){ // blargh!
if(isset($stateattr->info)) {
$statearr = $stateattr->attributes();
echo '<optgroup label="'.$statearr['statename'].'">'."\n";
$options = array();
foreach($stateattr->info as $info) {
$options[] = $info;
}
usort($options, "sortCities"); // finish the sortCities
foreach($options as $stateattr => $info){
echo '<option value="'.$info->code.'">'.$info->location.'</option>'."\n";
}
echo '</optgroup>'."\n";
} else {
//empty nodes don't do squat
}
}
}
?>
This is the array that:
print_r($sortedStates);
prints out:
Array
(
[0] => SimpleXMLElement Object
(
[@attributes] => Array
(
[statename] => Maryland
)
[info] => Array
(
[0] => SimpleXMLElement Object
(
[code] => s5
[location] => Mount Laurel
)
[1] => SimpleXMLElement Object
(
[code] => f0
[location] => Baltimore
)
[2] => SimpleXMLElement Object
(
[code] => h4
[location] => Annapolis
)
)
)
[1] => SimpleXMLElement Object
(
[@attributes] => Array
(
[statename] => Mississippi
)
[info] => Array
(
[0] => SimpleXMLElement Object
(
[code] => a1
[location] => Jackson
)
[1] => SimpleXMLElement Object
(
[code] => d2
[location] => Gulfport
)
[2] => SimpleXMLElement Object
(
[code] => g6
[location] => Hattiesburg
)
)
)
[2] => SimpleXMLElement Object
(
[@attributes] => Array
(
[statename] => Texas
)
[info] => Array
(
[0] => SimpleXMLElement Object
(
[code] => i9
[location] => Dallas
)
[1] => SimpleXMLElement Object
(
[code] => a7
[location] => Austin
)
)
)
)
this:
// start the sortCities
function sortCities($a, $b){
return strcmp($a->location, $b->location);
}
plus this part of code:
$options = array();
foreach($stateattr->info as $info) {
$options[] = $info;
}
usort($options, "sortCities"); // finish the sortCities
foreach($options as $stateattr => $info){
echo '<option value="'.$info->code.'">'.$info->location.'</option>'."\n";
}
is doing a fine job of sorting by the 'location' node within each optgroup.
You can see that in the array I can make it sort by the attribute 'statename'. What I am having trouble with is echoing out and combining the two functions in order to have it auto sort both the states and the cities within and forming the needed optgroups.
I tried copying the lines for the cities and changing the names called several ways to no avail.
