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一个PHP的String类代码

　　本文标签：PHP,String类

使用方法：
复制代码 代码如下:

$s =中国;
$os = new String( $s );
echo $os->decode(gbk) ,;
echo $os->decode(gbk)->encode(md5),;

代码
复制代码 代码如下:

class String extends stdClass
{
private $_val =;
public function __construct( $str = )
{
$this->_val = $str;
}
public function __toString()
{
return $this->_val;
}
public function encode( $coder )
{
$coder =encode_ . $coder;
if( method_exists( $this, $coder ) )
{
return $this->$coder();
}else{
return $this;
}
}
public function decode( $coder )
{
$coder =decode_ . $coder;
if( method_exists( $this, $coder ) )
{
return $this->$coder();
}else{
return $this;
}
}
private function encode_md5()
{
return new String( md5( $this->_val ) );
}
private function decode_gbk()
{
return new String( iconv(GBK,UTF-8, $this->_val ) );
}
}