array dns_get_record ( string $hostname [, int $type = DNS_ANY [, array &$authns [, array &$addtl ]]] )
<?php
$result = dns_get_record("php.net");print_r($result);?>
/** Create Node Class **/
class Node
{
public $parent = null;
public $left = null;
public $right = null;
public $data = null;
public function __construct($data)
{
$this->data = $data;
}
public function __toString()
{
return $this->data;
}
}
/** Create BinarySearchTree Class **/
class BinarySearchTree
{
protected $_root = null;
protected function _insert(&$new, &$node)
{
if ($node == null) {
$node = $new;
return;
}
if ($new->data <= $node->data) {
if ($node->left == null) {
$node->left = $new;
$new->parent = $node;
} else {
$this->_insert($new, $node->left);
}
} else {
if ($node->right == null) {
$node->right = $new;
$new->parent = $node;
} else {
$this->_insert($new, $node->right);
}
}
}
protected function _search(&$target, &$node)
{
if ($target == $node) {
return 1;
} else if ($target->data > $node->data && isset($node->right)) {
return $this->_search($target, $node->right);
} else if ($target->data <= $node->data && isset($node->left)) {
return $this->_search($target, $node->left);
}
return 0;
}
public function insert($node)
{
$this->_insert($node, $this->_root);
}
public function search($item)
{
return $this->_search($item, $this->_root);
}
}
/* Add Data in Nodes **/
$node1 = new Node(43);
$node2 = new Node(52);
$node3 = new Node(44);
$node4 = new Node(47);
$node5 = new Node(65);
/* Create Object **/
$obj = new BinarySearchTree();
$obj->insert($node1);
$obj->insert($node2);
$obj->insert($node3);
$obj->insert($node4);
$obj->insert($node5);
abstract class Button { protected $_html; public function getHtml() { return $this->_html; } } class ImageButton extends Button { public $_html = '<input height="60" name="image" src="rainbow.gif" type="image" width="60" />'; } class InputButton extends Button { public $_html = '<input name="button" type="button" value="Input Button" />'; } class FlashButton extends Button { public $_html = '<embed height="#" src="filename.swf" width="#"></embed>'; } class mybutton{ static function factory($buttonObj='InputButton'){ $obj = new $buttonObj(); return $obj->_html; } } /** get buttons by factory patter **/ echo mybutton::factory('ImageButton'); echo mybutton::factory('InputButton'); echo mybutton::factory('FlashButton');
Only one instance exist, in whole page.class Login { private static $instance; public static function getInstance() { if( is_null(self::$instance) ) { self::$instance = new self(); } return self::$instance; } /** * Singleton pattern implementation makes "new" unavailable * * @return void */ protected function __construct() {} /** * Singleton pattern implementation makes "clone" unavailable * * @return void */ protected function __clone() {} } $obj = Login::getInstance();
interface IObserver { function onChanged( $sender, $args ); } interface IObservable { function addObserver( $observer ); } class UserList implements IObservable { private $_observers = array(); public function addCustomer( $name ) { foreach( $this->_observers as $obs ) $obs->onChanged( $this, $name ); } public function addObserver( $observer ) { $this->_observers []= $observer; } } class UserListLogger implements IObserver { public function onChanged( $sender, $args ) { echo( "'$args' added to user list\n" ); } } $ul = new UserList(); $ul->addObserver( new UserListLogger() ); $ul->addCustomer( "Tester " );
