--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,103 @@
+<?php
+/**
+ * Case-insensitive dictionary, suitable for HTTP headers
+ *
+ * @package Requests
+ * @subpackage Utilities
+ */
+
+/**
+ * Case-insensitive dictionary, suitable for HTTP headers
+ *
+ * @package Requests
+ * @subpackage Utilities
+ */
+class Requests_Utility_CaseInsensitiveDictionary implements ArrayAccess, IteratorAggregate {
+	/**
+	 * Actual item data
+	 *
+	 * @var array
+	 */
+	protected $data = array();
+
+	/**
+	 * Creates a case insensitive dictionary.
+	 *
+	 * @param array $data Dictionary/map to convert to case-insensitive
+	 */
+	public function __construct(array $data = array()) {
+		foreach ($data as $key => $value) {
+			$this->offsetSet($key, $value);
+		}
+	}
+
+	/**
+	 * Check if the given item exists
+	 *
+	 * @param string $key Item key
+	 * @return boolean Does the item exist?
+	 */
+	public function offsetExists($key) {
+		$key = strtolower($key);
+		return isset($this->data[$key]);
+	}
+
+	/**
+	 * Get the value for the item
+	 *
+	 * @param string $key Item key
+	 * @return string Item value
+	 */
+	public function offsetGet($key) {
+		$key = strtolower($key);
+		if (!isset($this->data[$key])) {
+			return null;
+		}
+
+		return $this->data[$key];
+	}
+
+	/**
+	 * Set the given item
+	 *
+	 * @throws Requests_Exception On attempting to use dictionary as list (`invalidset`)
+	 *
+	 * @param string $key Item name
+	 * @param string $value Item value
+	 */
+	public function offsetSet($key, $value) {
+		if ($key === null) {
+			throw new Requests_Exception('Object is a dictionary, not a list', 'invalidset');
+		}
+
+		$key = strtolower($key);
+		$this->data[$key] = $value;
+	}
+
+	/**
+	 * Unset the given header
+	 *
+	 * @param string $key
+	 */
+	public function offsetUnset($key) {
+		unset($this->data[strtolower($key)]);
+	}
+
+	/**
+	 * Get an iterator for the data
+	 *
+	 * @return ArrayIterator
+	 */
+	public function getIterator() {
+		return new ArrayIterator($this->data);
+	}
+
+	/**
+	 * Get the headers as an array
+	 *
+	 * @return array Header data
+	 */
+	public function getAll() {
+		return $this->data;
+	}
+}