laipower/wp-content/plugins/easy-digital-downloads/includes/libraries/class-ArrayToXML.php

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<?php
/**
* Based on: http://stackoverflow.com/questions/99350/passing-php-associative-arrays-to-and-from-xml
*/
class ArrayToXML
{
private $version;
private $encoding;
/**
* Construct ArrayToXML object with selected version and encoding
*
* for available values check XmlWriter docs http://www.php.net/manual/en/function.xmlwriter-start-document.php
* @param string $xmlVersion XML Version, default 1.0
* @param string $xmlEncoding XML Encoding, default UTF-8
*/
public function __construct($xmlVersion = '1.0', $xmlEncoding = 'UTF-8')
{
$this->version = $xmlVersion;
$this->encoding = $xmlEncoding;
}
/**
* Build an XML Data Set
*
* @param array $data Associative Array containing values to be parsed into an XML Data Set(s)
* @param string $startElement Root Opening Tag, default data
* @return string XML String containing values
* @return mixed Boolean false on failure, string XML result on success
*/
public function buildXML($data, $startElement = 'data')
{
if (!is_array($data)) {
$err = 'Invalid variable type supplied, expected array not found on line ' . __LINE__ . ' in Class: ' . __CLASS__ . ' Method: ' . __METHOD__;
trigger_error($err);
return false; //return false error occurred
}
$xml = new XmlWriter();
$xml->openMemory();
$xml->startDocument($this->version, $this->encoding);
$xml->startElement($startElement);
$data = $this->writeAttr($xml, $data);
$this->writeEl($xml, $data);
$xml->endElement(); //write end element
//returns the XML results
return $xml->outputMemory(true);
}
/**
* Write keys in $data prefixed with @ as XML attributes, if $data is an array.
* When an @ prefixed key is found, a '%' key is expected to indicate the element itself,
* and '#' prefixed key indicates CDATA content
*
* @param XMLWriter $xml object
* @param array $data with attributes filtered out
* @return array $data | $nonAttributes
*/
protected function writeAttr(XMLWriter $xml, $data)
{
if (is_array($data)) {
$nonAttributes = array();
foreach ($data as $key => $val) {
//handle an attribute with elements
if ($key[0] == '@') {
$xml->writeAttribute(substr($key, 1), $val);
} else if ($key[0] == '%') {
if (is_array($val)) $nonAttributes = $val;
else $xml->text($val);
} elseif ($key[0] == '#') {
if (is_array($val)) $nonAttributes = $val;
else {
$xml->startElement(substr($key, 1));
$xml->writeCData($val);
$xml->endElement();
}
}else if($key[0] == "!"){
if (is_array($val)) $nonAttributes = $val;
else $xml->writeCData($val);
}
//ignore normal elements
else $nonAttributes[$key] = $val;
}
return $nonAttributes;
} else return $data;
}
/**
* Write XML as per Associative Array
*
* @param XMLWriter $xml object
* @param array $data Associative Data Array
*/
protected function writeEl(XMLWriter $xml, $data)
{
foreach ($data as $key => $value) {
if (is_array($value) && !$this->isAssoc($value)) { //numeric array
foreach ($value as $itemValue) {
if (is_array($itemValue)) {
$xml->startElement($key);
$itemValue = $this->writeAttr($xml, $itemValue);
$this->writeEl($xml, $itemValue);
$xml->endElement();
} else {
$itemValue = $this->writeAttr($xml, $itemValue);
$xml->writeElement($key, "$itemValue");
}
}
} else if (is_array($value)) { //associative array
$xml->startElement($key);
$value = $this->writeAttr($xml, $value);
$this->writeEl($xml, $value);
$xml->endElement();
} else { //scalar
$value = $this->writeAttr($xml, $value);
$xml->writeElement($key, "$value");
}
}
}
/**
* Check if array is associative with string based keys
* FROM: http://stackoverflow.com/questions/173400/php-arrays-a-good-way-to-check-if-an-array-is-associative-or-sequential/4254008#4254008
*
* @param array $array Array to check
* @return bool
*/
protected function isAssoc($array)
{
return (bool)count(array_filter(array_keys($array), 'is_string'));
}
}