1 files changed, 111 insertions, 0 deletions
diff --git a/engine/lib/xml.php b/engine/lib/xml.php
new file mode 100644
index 000000000..497459d83
--- /dev/null
+++ b/engine/lib/xml.php
@@ -0,0 +1,111 @@
+<?php
+/**
+ * Elgg XML library.
+ * Contains functions for generating and parsing XML.
+ *
+ * @package Elgg.Core
+ * @subpackage XML
+ */
+
+/**
+ * This function serialises an object recursively into an XML representation.
+ *
+ * The function attempts to call $data->export() which expects a stdClass in return,
+ * otherwise it will attempt to get the object variables using get_object_vars (which
+ * will only return public variables!)
+ *
+ * @param mixed  $data The object to serialise.
+ * @param string $name The name?
+ * @param int    $n    Level, only used for recursion.
+ *
+ * @return string The serialised XML output.
+ */
+function serialise_object_to_xml($data, $name = "", $n = 0) {
+	$classname = ($name == "" ? get_class($data) : $name);
+
+	$vars = method_exists($data, "export") ? get_object_vars($data->export()) : get_object_vars($data);
+
+	$output = "";
+
+	if (($n == 0) || ( is_object($data) && !($data instanceof stdClass))) {
+		$output = "<$classname>";
+	}
+
+	foreach ($vars as $key => $value) {
+		$output .= "<$key type=\"" . gettype($value) . "\">";
+
+		if (is_object($value)) {
+			$output .= serialise_object_to_xml($value, $key, $n + 1);
+		} else if (is_array($value)) {
+			$output .= serialise_array_to_xml($value, $n + 1);
+		} else if (gettype($value) == "boolean") {
+			$output .= $value ? "true" : "false";
+		} else {
+			$output .= htmlspecialchars($value, ENT_NOQUOTES, 'UTF-8');
+		}
+
+		$output .= "</$key>\n";
+	}
+
+	if (($n == 0) || (is_object($data) && !($data instanceof stdClass))) {
+		$output .= "</$classname>\n";
+	}
+
+	return $output;
+}
+
+/**
+ * Serialise an array.
+ *
+ * @param array $data The data to serialize
+ * @param int   $n    Used for recursion
+ *
+ * @return string
+ */
+function serialise_array_to_xml(array $data, $n = 0) {
+	$output = "";
+
+	if ($n == 0) {
+		$output = "<array>\n";
+	}
+
+	foreach ($data as $key => $value) {
+		$item = "array_item";
+
+		if (is_numeric($key)) {
+			$output .= "<$item name=\"$key\" type=\"" . gettype($value) . "\">";
+		} else {
+			$item = $key;
+			$output .= "<$item type=\"" . gettype($value) . "\">";
+		}
+
+		if (is_object($value)) {
+			$output .= serialise_object_to_xml($value, "", $n + 1);
+		} else if (is_array($value)) {
+			$output .= serialise_array_to_xml($value, $n + 1);
+		} else if (gettype($value) == "boolean") {
+			$output .= $value ? "true" : "false";
+		} else {
+			$output .= htmlspecialchars($value, ENT_NOQUOTES, 'UTF-8');
+		}
+
+		$output .= "</$item>\n";
+	}
+
+	if ($n == 0) {
+		$output .= "</array>\n";
+	}
+
+	return $output;
+}
+
+/**
+ * Parse an XML file into an object.
+ *
+ * @param string $xml The XML
+ *
+ * @return ElggXMLElement
+ */
+function xml_to_object($xml) {
+	return new ElggXMLElement($xml);
+}