<?php

namespace Addcn\Model\Tools\Filter;

/**

*

* +------------------------------------------------

* unicode 變化轉換類

* +------------------------------------------------

* @author gaosongwang <songwanggao@gmail.com>

* +-------------------------------------------------

* @version 2016/6/2

* +-------------------------------------------------

*/

class Unicode {

/**

*

* 將字符轉為unicode碼

* @param unknown_type $str

* @param unknown_type $encoding

*/

public static function charCodeAt($str, $encoding = false ){

$encoding = $encoding ? $encoding : 'utf-8';

if(strlen($str) == 1) return ord($str);

$str = mb_substr($str, 0,1, $encoding);

$convert = mb_convert_encoding($str, 'UCS-4BE', $encoding);

$tmp = unpack('N', $convert);

return $tmp[1];

}

/**

*

* 將unicode碼轉為字符

* @param unknown_type $code

* @param unknown_type $encoding

*/

public static function fromCharCodeAt($code, $encoding = false){

$encoding = $encoding ? $encoding : 'utf-8';

if($code < 128) return chr($code);

$tmp = pack('N', $code);

$convert = mb_convert_encoding($tmp, $encoding, 'UCS-4BE');

return $convert;

}

}