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behavioral-iterator-2.php
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behavioral-iterator-2.php
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<?php
/**
* This example just to simulate how Iterator can be work
* 2nees.com
*/
class CustomIterableIgnoreSomeCountries implements \Iterator {
private int $pointer;
private int $startPoint;
private array $countriesList;
/**
* Countries constructor.
* @param array $countriesList
*/
public function __construct(array $countriesList)
{
$this->startPoint = rand(0, 1);
$this->countriesList = $countriesList;
}
public function current()
{
return $this->countriesList[$this->pointer];
}
public function next()
{
$this->pointer += 2;
}
public function key()
{
return $this->pointer;
}
public function valid()
{
return isset($this->countriesList[$this->pointer]);
}
public function rewind()
{
$this->pointer = $this->startPoint;
}
}
class Countries implements \IteratorAggregate {
private array $countriesList;
/**
* Countries constructor.
* @param array $countriesList
*/
public function __construct(array $countriesList)
{
$this->countriesList = $countriesList;
}
public function getIterator(): ArrayIterator
{
return new ArrayIterator($this->countriesList);
}
public function getIteratorAsort(): ArrayIterator
{
$list = new ArrayIterator($this->countriesList);
$list->asort();
return $list;
}
public function customIterable(): CustomIterableIgnoreSomeCountries
{
return new CustomIterableIgnoreSomeCountries($this->countriesList);
}
}
$countriesList = new Countries([
"Jordan", "Egypt", "Palestine", "Syria"
]);
foreach ($countriesList as $country){
echo "Default Iterable => " . $country . PHP_EOL;
}
echo "==============================================" . PHP_EOL;
foreach ($countriesList->getIteratorAsort() as $country){
echo "Iterator ASORT => " . $country . PHP_EOL;
}
echo "==============================================" . PHP_EOL;
foreach ($countriesList->customIterable() as $country){
echo "Custom Iterable => " . $country . PHP_EOL;
}