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873天前<?php |
/** |
* Iterator模式的简单实现类 |
*/ |
class sample implements Iterator { |
private $_items ; |
|
public function __construct(&$data) { |
$this->_items = $data; |
} |
public function current() { |
return current($this->_items); |
} |
|
public function next() { |
next($this->_items); |
} |
|
public function key() { |
return key($this->_items); |
} |
|
public function rewind() { |
reset($this->_items); |
} |
|
public function valid() { |
return ($this->current() !== FALSE); |
} |
} |
|
/** DEMO */ |
$data = array(1, 2, 3, 4, 5); |
$sa = new sample($data); |
foreach ($sa AS $key => $row) { |
echo $key, ' ', $row, '<br />'; |
} |
?> |
