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api_helpers.php
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<?php
//
// API helpers function
//
// XML outputs code uses:
// - http://www.thedeveloperday.com/xml-beautifier-tool/
// - http://snipplr.com/view/3491/convert-php-array-to-xml-or-simple-xml-object-if-you-wish/
/**
* The main function for converting to an XML document.
* Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.
*
* @param mixed $data
* @param string $rootNodeName - what you want the root node to be - defaultsto data.
* @param SimpleXMLElement $xml - should only be used recursively
* @param string $unknownNodeName - name to give to unknown (numeric) keys
* @return string XML
*/
function toXml($data, $rootNodeName = 'data', $xml = null, $unknownNodeName = 'unknownNode')
{
if (!$rootNodeName) $rootNodeName = 'data';
if (!$unknownNodeName) $unknownNodeName = 'unknownNode';
// turn off compatibility mode as simple xml throws a wobbly if you don't.
if (ini_get('zend.ze1_compatibility_mode') == 1)
ini_set('zend.ze1_compatibility_mode', 0);
if ($xml == null) {
if (!is_array($data) && !is_object($data)) {
//We've a singleton
if (is_bool($data)) $data = $data ? 'true' : 'false';
return "<?xml version='1.0' encoding='utf-8'?><$rootNodeName>$data</$rootNodeName>";
}
//Starts with simple document
$xml = simplexml_load_string("<?xml version='1.0' encoding='utf-8'?><$rootNodeName />");
}
// loop through the data passed in.
foreach($data as $key => $value) {
// no numeric keys in our xml please!
if (is_numeric($key)) {
// make string key...
$key = $unknownNodeName . '_'. (string) $key;
}
// replace anything not alpha numeric
$key = preg_replace('/[^a-z]/i', '', $key);
//If there is another array found recrusively call this function
if (is_array($value)) {
$node = $xml->addChild($key);
//Recursive call.
toXml($value, $rootNodeName, $node, $unknownNodeName);
} elseif (is_object($value)) {
$node = $xml->addChild($key);
foreach ($value as $subkey => $subvalue) {
if ($subkey == "lastError") continue;
if ($subvalue === null) {
//Ignore null values
continue;
} elseif (is_array($subvalue) || is_object($subvalue)) {
//TODO: test this
//Recursive call.
$subnode = $node->addChild($subkey);
toXml($subvalue, $rootNodeName, $subnode, $unknownNodeName);
} elseif (is_bool($subvalue)) {
$node->addChild($subkey, $subvalue ? 'true' : 'false');
} else {
$node->addChild($subkey, htmlentities($subvalue));
}
}
//die();
//$array = array();
//$node = $xml->addChild($key);
//toXml($value, $rootNodeName, $node, $unknownNodeName);
} elseif (is_bool($value)) {
$xml->addChild($key, $value ? 'true' : 'false');
} else {
//Adds single node.
if ($value || $value === 0) {
$value = htmlentities($value);
$xml->addChild($key,$value);
}
}
}
// pass back as string. or simple xml object if you want!
return $xml->asXML();
}
function api_output ($reply, $xmlRoot = null, $xmlChildren = null) {
$format = isset($_REQUEST['format']) ? $_REQUEST['format'] : 'preview';
switch ($format) {
case 'preview':
echo '<pre>';
print_r($reply);
echo '</pre>';
break;
case 'php':
echo serialize($reply);
break;
case 'wddx':
require_once('BeautyXML.class.php');
$bc = new BeautyXML();
echo $bc->format(wddx_serialize_value($reply));
break;
case 'json':
echo json_encode($reply);
break;
case 'xml':
require_once('BeautyXML.class.php');
$bc = new BeautyXML();
echo '<?xml version="1.0" encoding="utf-8"?>';
echo "\n";
echo $bc->format(toXml($reply, $xmlRoot, null, $xmlChildren));
break;
case 'string':
echo $reply;
break;
default:
echo "Unknown API format: $_GET[format]";
break;
}
}
?>

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