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Example usage for ArrayAccess interface
<?php
class Product implements ArrayAccess
{
protected $_productId;
protected $_title;
protected $_price;
protected $_arrayAccess;
public function __construct($data = null)
{
if (null !== $data) {
$this->populate($data);
}
$this->_arrayAccess = $this->toArray();
}
public function setProductId($productId)
{
$this->_productId = (int) $productId;
return $this;
}
public function getProductId()
{
return $this->_productId;
}
public function setTitle($title)
{
$this->_title = (string) $title;
return $this;
}
public function getTitle()
{
return $this->_title;
}
public function setPrice($price)
{
$this->_price = (float) $price;
return $this;
}
public function getPrice()
{
return $this->_price;
}
public function populate($row)
{
if (is_array($row)) {
$row = new ArrayObject($row, ArrayObject::ARRAY_AS_PROPS);
}
$this->setProductId($row->productId)
->setTitle($row->title)
->setPrice($row->price);
}
public function toArray()
{
return array (
'productId' => $this->getProductId(),
'title' => $this->getTitle(),
'price' => $this->getPrice(),
);
}
/**
* (PHP 5 &gt;= 5.0.0)<br/>
* Whether a offset exists
* @link http://php.net/manual/en/arrayaccess.offsetexists.php
* @param mixed $offset <p>
* An offset to check for.
* </p>
* @return boolean true on success or false on failure.
* </p>
* <p>
* The return value will be casted to boolean if non-boolean was returned.
*/
public function offsetExists($offset)
{
return isset ($this->_arrayAccess[$offset]);
}
/**
* (PHP 5 &gt;= 5.0.0)<br/>
* Offset to retrieve
* @link http://php.net/manual/en/arrayaccess.offsetget.php
* @param mixed $offset <p>
* The offset to retrieve.
* </p>
* @return mixed Can return all value types.
*/
public function offsetGet($offset)
{
return $this->offsetExists($offset) ? $this->_arrayAccess[$offset] : null;
}
/**
* (PHP 5 &gt;= 5.0.0)<br/>
* Offset to set
* @link http://php.net/manual/en/arrayaccess.offsetset.php
* @param mixed $offset <p>
* The offset to assign the value to.
* </p>
* @param mixed $value <p>
* The value to set.
* </p>
* @return void
*/
public function offsetSet($offset, $value)
{
if (is_null($offset)) {
$this->_arrayAccess[] = $value;
} else {
$this->_arrayAccess[$offset] = $value;
}
}
/**
* (PHP 5 &gt;= 5.0.0)<br/>
* Offset to unset
* @link http://php.net/manual/en/arrayaccess.offsetunset.php
* @param mixed $offset <p>
* The offset to unset.
* </p>
* @return void
*/
public function offsetUnset($offset)
{
unset ($this->_arrayAccess[$offset]);
}
}
<?php
class ProductCollection implements Countable, SeekableIterator
{
protected $_stack;
protected $_position;
protected $_count;
public function __construct()
{
$this->rewind();
$this->_count = 0;
$this->_stack = array ();
}
public function addEntity($entity)
{
$this->_stack[] = $entity;
$this->_count++;
}
public function rewind()
{
$this->_position = 0;
}
public function next()
{
$this->_position++;
}
public function key()
{
return $this->_position;
}
public function current()
{
return $this->_stack[$this->_position];
}
public function valid()
{
return isset ($this->_stack[$this->_position]);
}
public function seek($position)
{
$this->_position = $position;
}
public function count()
{
return $this->_count;
}
}
<?php
require_once 'Product.php';
require_once 'ProductCollection.php';
$productCollection = new ProductCollection();
$productCollection->addEntity(new Product(array ('productId' => 1, 'title' => 'backpack', 'price' => 29.95)));
$productCollection->addEntity(new Product(array ('productId' => 2, 'title' => 'baseball cap', 'price' => 19.95)));
$productCollection->addEntity(new Product(array ('productId' => 3, 'title' => 'tent', 'price' => 195.95)));
$productCollection->addEntity(new Product(array ('productId' => 4, 'title' => 'sleeping bag', 'price' => 69.00)));
echo "We now have {$productCollection->count()} elements in our stack" . PHP_EOL;
foreach ($productCollection as $product) {
echo $product->getTitle() . "\t" . $product->getPrice() . PHP_EOL;
}
foreach ($productCollection as $product) {
echo $product['title'] . "\t" . $product['price'] . PHP_EOL;
}
@DragonBe

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Owner Author

@DragonBe DragonBe commented Mar 28, 2014

The results are as expected, both OOP as accessed as array:

We now have 4 elements in our stack
backpack 29.95
baseball cap 19.95
tent 195.95
sleeping bag 69
backpack 29.95
baseball cap 19.95
tent 195.95
sleeping bag 69

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