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    ▪php 中英文语言转换类       起初想到制成XML文档形式，这样操作也起来很容易。只是看到说XML效率不怎样 再者就是不同的模板，可这样也有个小问题，有些词汇比如时间提示是不确定，与可能是minute ，day。也有可能.........

    ▪php继承的一个应用       这样我 想到了继承来解决，前面发表过一个会话类，这下简单多了，通过登录来设置用户的级别，$session->get_status()的返回 值如果是0，则表明当前用户并不是博主，因此并不具有删除，.........

    ▪php 抽象类的简单应用       All right, 父类postParent定义为抽象，规定子类必须重新实现 buildHTML()方法，这个方法并没有花括号，如果有不管有没有内容都会报错的。 现在越看越觉得这代码完全没必要用抽象类，用继承.........

代码如下:

class language
{
static $lanObject;
public $type; // unit , dashboard , menu ,other
public $lan; // language
private $special; // The common in the file
private function __construct()
{
if( isset($_GET['hl']) || isset($_POST['hl']) )
{
switch( isset($_GET['hl'])?$_GET['hl']:$_POST['hl'] )
{
case 'en':
$this->lan = 'en';
case 'zh':
$this->lan = 'zh';
case 'all':
$this->lan = 'all';
default:
$this->error();
}
}
else
$this->lan = isset($_COOKIE['hl']) ? $_COOKIE['hl']:'zh';
}
public static function getObject()
{
if( !(self::$lanObject instanceof self) )
self::$lanObject = new language();
return self::$lanObject;
}
public function lto($key) //$key is English
{
if( $this->lan !== 'zh' )
return $key;
if( empty($this->special) ) // if the $special is null
{
if( isset($this->type) )
$this->special = file_get_contents($this->type.'.txt');
else
return $key;
}
echo $this->search($key);
}
private function search($searchTozh) // PHP String
{
$key_start = strpos($this->special,$searchTozh);
$key_end = strpos($this->special,' ',$key_start);
$len_str = strlen($searchTozh);
$for_sub = $key_start + $len_str + 1;
return substr($this->special, $for_sub, $key_end - $for_sub);
}
}

代码如下:

$la = language::getObject();
$la->type = 'unit';
$la->lto('min');
echo '<br/>';
$la->lto('hello');

代码如下:

class operationLimit
// operating limit. When no user login or is not this user
{
/* for limit the user operat at post.
* @author:xiaoai 8.12 2011
*/
static $limitObject;
public function __construct() {}
// when call the function but does not exist
public static function getObject()
{
if( !(self::$limitObject instanceof self))
self::$limitObject = new self;
return self::$limitObject ;
}
protected function setLimit() {}
public function getReadA($postName)
{
return '<a herf=\'http://foodstory.me/post/'.$postname.
'.php\' readmoreLink\'>readmore</a>';
}
}
class operationUnlimit extends operationLimit
// when is this user
{
public static function getObject()
{
if( !(self::$limitObject instanceof self))
self::$limitObject = new self;
return self::$limitObject ;
}
public function getUpdateA($name)
{
return '<a href=/index.html'http://foodstory.me/post/'.$name.
'.php?do=update\' id=\''.$name.'\' >update</a>';
}
public function getDelectA($name)
{
return '<a href=/index.html'javascript:delectPOST('.$name
.');\' id=\'delectPOST\' >delect</a>';
}
}
class LimitFactory
{
public static function getLimitObject($userStatus)
// $userStatus = $session->get_status();
{
switch ( $userStatus )
{
case 0:
return operationLimit::getObject();
case 1:
return operationUnlimit::getObject();
default:
return limit::getObject();
}
}
}

代码如下:

$limitObj = LimitFactory::getLimitObject($session->get_status());
echo $limitObj->getReadA('hi');
echo $limitObj->getDelectA('hah');

代码如下:

abstract class postParent
{
protected $querySQL;
public $fetchResult;
public $timeAgo; // eg : 2 days ago
abstract protected function buildHTML();
public function getSQL()
{
return $this->querySQL;
}
public function fetchResult( $result )
{
$this->fetchResult = mysql_fetch_assoc( $result );
}
public function error()
{}
}
class readArticle extends postParent
{
public function __construct( $id )
{
$this->querySQL =<<<eof
SELECT title, author, text, unixtime FROM post
WHERE id = $id ORDER BY unixtime DESC;
eof;
}
public function buildHTML()
{
return <<<eof
<div id="post-text">
<div >
<h4>
<a href="http://foodstory.me/post.php?id={$this->fetchResult['id']}"
> {$this->fetchResult['title']}
</a>
</h4>
</div>
<div >
<span >{$this->fetchResult['author']}</span> at
<time >{$this->timeAgo}</time>
</div>
<div >
{$this->fetchResult['text']}
</div>
</div>
eof;
}
}