array(
name => "Animals",
description => "All your favorites from aardvarks to zebras.",
items => array(
array(
name => "Pets",
),
array(
name => "Farm Animals",
),
array(
name => "Wild Animals",
)
)
),
colors => array(
name => "Colors",
description => "Fresh colors from the magic rainbow.",
items => array(
array(
name => "Blue",
),
array(
name => "Green",
),
array(
name => "Orange",
),
array(
name => "Purple",
),
array(
name => "Red",
),
array(
name => "Yellow",
),
array(
name => "Violet",
)
)
),
vehicles => array(
name => "Vehicles",
description => "Everything from cars to planes.",
items => array(
array(
name => "Cars",
),
array(
name => "Planes",
),
array(
name => "Construction",
)
)
)
);
// Get the name of the category to display from
// the query params for the script.
$category_name = '';
if ( $_GET[ 'id' ] ) {
$category_name = $_GET[ 'id' ];
}
// Now get the category data, by name, from our in-memory
// dictionary. This is the part where a script normally fetches
// the data from a database.
$category_obj = $category_data[ $category_name ];
// Now figure out how the script is being called. If it's being
// called via XmlHttpRequest, then send the data back as JSON.
// If not, then send it back as a list in an HTML document.
if( $_SERVER[ "HTTP_X_REQUESTED_WITH" ] && $_SERVER[ "HTTP_X_REQUESTED_WITH" ] ==="XMLHttpRequest" ) {
// Data should be written out as JSON.
header("Content-type: application/json");
if ( !$category_obj ) {
echo 'null';
} else {
echo '{"name":"' . $category_obj[ 'name' ]
. '","description":"' . $category_obj[ 'description' ]
. '","items":[';
$arr = $category_obj[ 'items' ];
$count = count($arr);
for ( $i = 0; $i < $count; $i++ ) {
if ( $i ) {
echo ",";
}
echo '{"name":"' . $arr[ $i ][ 'name' ] . '"}';
}
echo "]}";
}
} else {
// Data should be written out as HTML.
header("Content-type: text/html");
?>
Vehicles