分享PHP代码 UTF-8和Unicode编码互转（多语言）

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PHP UTF-8和Unicode编码互转
/**
* //将内容进行UNICODE编码
* utf-8 转unicode
*
* @param string $name
* @return string
*/
function utf8_unicode($name){  
$name = iconv('UTF-8', 'UCS-2', $name);  
$len  = strlen($name);  
$str  = '';  
for ($i = 0; $i < $len - 1; $i = $i + 2){  
$c  = $name[$i];  
$c2 = $name[$i + 1];  
if (ord($c) > 0){   //两个字节的文字  
$str .= '\u'.base_convert(ord($c), 10, 16).str_pad(base_convert(ord($c2), 10, 16), 2, 0, STR_PAD_LEFT);  
//$str .= base_convert(ord($c), 10, 16).str_pad(base_convert(ord($c2), 10, 16), 2, 0, STR_PAD_LEFT);  
} else {  
$str .= '\u'.str_pad(base_convert(ord($c2), 10, 16), 4, 0, STR_PAD_LEFT);  
//$str .= str_pad(base_convert(ord($c2), 10, 16), 4, 0, STR_PAD_LEFT);  
}  
}  
$str = strtoupper($str);//转换为大写  
return $str;  
}  
/**
* unicode 转 utf-8
*
* @param string $name
* @return string
*/  
function unicode_decodessss($name)  
{  
$name = strtolower($name);  
// 转换编码，将Unicode编码转换成可以浏览的utf-8编码  
$pattern = '/([\w]+)|(\\\u([\w]{4}))/i';  
preg_match_all($pattern, $name, $matches);  
if (!empty($matches))  
{  
$name = '';  
for ($j = 0; $j < count($matches[0]); $j++)  
{  
$str = $matches[0][$j];  
if (strpos($str, '\\u') === 0)  
{  
$code = base_convert(substr($str, 2, 2), 16, 10);  
$code2 = base_convert(substr($str, 4), 16, 10);  
$c = chr($code).chr($code2);  
$c = iconv('UCS-2', 'UTF-8', $c);  
$name .= $c;  
}  
else  
{  
$name .= $str;  
}  
}  
}  
return $name;  
}  

调用及结果:
$utf8_str = '我';
//这是汉字“你”的Unicode编码
$unicode_str = '\u4f60';
//输出 6211
echo utf8_unicode($utf8_str) . "<br/>";
//输出汉字“你”
echo unicode_decodes($unicode_str);

注:  由于浏览器默认会解读，所以要看源代码
\U6211<br/>
你