- var_dump: documentation ( source)
- reset: documentation ( source)
- array_keys: documentation ( source)
- session_start: documentation ( source)
- next: documentation ( source)
<?php
session_start();
$_SESSION['foo'] = 1;
class SessionIterator implements \Iterator
{
/**
* @var array list of keys in the map
*/
private $_keys;
/**
* @var mixed current key
*/
private $_key;
/**
* Constructor.
*/
public function __construct()
{
$this->_keys = array_keys($_SESSION ?? []);
}
/**
* Rewinds internal array pointer.
* This method is required by the interface [[\Iterator]].
*/
#[\ReturnTypeWillChange]
public function rewind()
{
$this->_key = reset($this->_keys);
}
/**
* Returns the key of the current array element.
* This method is required by the interface [[\Iterator]].
* @return mixed the key of the current array element
*/
#[\ReturnTypeWillChange]
public function key()
{
return $this->_key;
}
/**
* Returns the current array element.
* This method is required by the interface [[\Iterator]].
* @return mixed the current array element
*/
#[\ReturnTypeWillChange]
public function current()
{
return isset($_SESSION[$this->_key]) ? $_SESSION[$this->_key] : null;
}
/**
* Moves the internal pointer to the next array element.
* This method is required by the interface [[\Iterator]].
*/
#[\ReturnTypeWillChange]
public function next()
{
do {
$this->_key = next($this->_keys);
} while (!isset($_SESSION[$this->_key]) && $this->_key !== false);
}
/**
* Returns whether there is an element at current position.
* This method is required by the interface [[\Iterator]].
* @return bool
*/
#[\ReturnTypeWillChange]
public function valid()
{
return $this->_key !== false;
}
}
$si = new SessionIterator();
foreach ($si as $key => $value) {
var_dump($key, $value);
}