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- <?php
- /**
- * @link http://www.yiiframework.com/
- * @copyright Copyright (c) 2008 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
- namespace yii\web;
-
- use Yii;
- use yii\base\Object;
- use ArrayIterator;
-
- /**
- * HeaderCollection is used by [[Response]] to maintain the currently registered HTTP headers.
- *
- * @property integer $count The number of headers in the collection. This property is read-only.
- * @property ArrayIterator $iterator An iterator for traversing the headers in the collection. This property
- * is read-only.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @since 2.0
- */
- class HeaderCollection extends Object implements \IteratorAggregate, \ArrayAccess, \Countable
- {
- /**
- * @var array the headers in this collection (indexed by the header names)
- */
- private $_headers = [];
-
-
- /**
- * Returns an iterator for traversing the headers in the collection.
- * This method is required by the SPL interface `IteratorAggregate`.
- * It will be implicitly called when you use `foreach` to traverse the collection.
- * @return ArrayIterator an iterator for traversing the headers in the collection.
- */
- public function getIterator()
- {
- return new ArrayIterator($this->_headers);
- }
-
- /**
- * Returns the number of headers in the collection.
- * This method is required by the SPL `Countable` interface.
- * It will be implicitly called when you use `count($collection)`.
- * @return integer the number of headers in the collection.
- */
- public function count()
- {
- return $this->getCount();
- }
-
- /**
- * Returns the number of headers in the collection.
- * @return integer the number of headers in the collection.
- */
- public function getCount()
- {
- return count($this->_headers);
- }
-
- /**
- * Returns the named header(s).
- * @param string $name the name of the header to return
- * @param mixed $default the value to return in case the named header does not exist
- * @param boolean $first whether to only return the first header of the specified name.
- * If false, all headers of the specified name will be returned.
- * @return string|array the named header(s). If `$first` is true, a string will be returned;
- * If `$first` is false, an array will be returned.
- */
- public function get($name, $default = null, $first = true)
- {
- $name = strtolower($name);
- if (isset($this->_headers[$name])) {
- return $first ? reset($this->_headers[$name]) : $this->_headers[$name];
- } else {
- return $default;
- }
- }
-
- /**
- * Adds a new header.
- * If there is already a header with the same name, it will be replaced.
- * @param string $name the name of the header
- * @param string $value the value of the header
- * @return static the collection object itself
- */
- public function set($name, $value = '')
- {
- $name = strtolower($name);
- $this->_headers[$name] = (array) $value;
-
- return $this;
- }
-
- /**
- * Adds a new header.
- * If there is already a header with the same name, the new one will
- * be appended to it instead of replacing it.
- * @param string $name the name of the header
- * @param string $value the value of the header
- * @return static the collection object itself
- */
- public function add($name, $value)
- {
- $name = strtolower($name);
- $this->_headers[$name][] = $value;
-
- return $this;
- }
-
- /**
- * Sets a new header only if it does not exist yet.
- * If there is already a header with the same name, the new one will be ignored.
- * @param string $name the name of the header
- * @param string $value the value of the header
- * @return static the collection object itself
- */
- public function setDefault($name, $value)
- {
- $name = strtolower($name);
- if (empty($this->_headers[$name])) {
- $this->_headers[$name][] = $value;
- }
-
- return $this;
- }
-
- /**
- * Returns a value indicating whether the named header exists.
- * @param string $name the name of the header
- * @return boolean whether the named header exists
- */
- public function has($name)
- {
- $name = strtolower($name);
-
- return isset($this->_headers[$name]);
- }
-
- /**
- * Removes a header.
- * @param string $name the name of the header to be removed.
- * @return array the value of the removed header. Null is returned if the header does not exist.
- */
- public function remove($name)
- {
- $name = strtolower($name);
- if (isset($this->_headers[$name])) {
- $value = $this->_headers[$name];
- unset($this->_headers[$name]);
- return $value;
- } else {
- return null;
- }
- }
-
- /**
- * Removes all headers.
- */
- public function removeAll()
- {
- $this->_headers = [];
- }
-
- /**
- * Returns the collection as a PHP array.
- * @return array the array representation of the collection.
- * The array keys are header names, and the array values are the corresponding header values.
- */
- public function toArray()
- {
- return $this->_headers;
- }
-
- /**
- * Populates the header collection from an array.
- * @param array $array the headers to populate from
- * @since 2.0.3
- */
- public function fromArray(array $array)
- {
- $this->_headers = $array;
- }
-
- /**
- * Returns whether there is a header with the specified name.
- * This method is required by the SPL interface `ArrayAccess`.
- * It is implicitly called when you use something like `isset($collection[$name])`.
- * @param string $name the header name
- * @return boolean whether the named header exists
- */
- public function offsetExists($name)
- {
- return $this->has($name);
- }
-
- /**
- * Returns the header with the specified name.
- * This method is required by the SPL interface `ArrayAccess`.
- * It is implicitly called when you use something like `$header = $collection[$name];`.
- * This is equivalent to [[get()]].
- * @param string $name the header name
- * @return string the header value with the specified name, null if the named header does not exist.
- */
- public function offsetGet($name)
- {
- return $this->get($name);
- }
-
- /**
- * Adds the header to the collection.
- * This method is required by the SPL interface `ArrayAccess`.
- * It is implicitly called when you use something like `$collection[$name] = $header;`.
- * This is equivalent to [[add()]].
- * @param string $name the header name
- * @param string $value the header value to be added
- */
- public function offsetSet($name, $value)
- {
- $this->set($name, $value);
- }
-
- /**
- * Removes the named header.
- * This method is required by the SPL interface `ArrayAccess`.
- * It is implicitly called when you use something like `unset($collection[$name])`.
- * This is equivalent to [[remove()]].
- * @param string $name the header name
- */
- public function offsetUnset($name)
- {
- $this->remove($name);
- }
- }
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