C# 中 UTF8Encoding.UTF8.GetBytes（key）,对应PHP中的哪个方法？ 如何写

$s = '中文abc';<br />$s = iconv('gbk', 'utf-8', $s); //不是 utf-8 时需转 utf-8<br />print_r(unpack('C*', $s));

Array<br />(<br />    [1] => 228<br />    [2] => 184<br />    [3] => 173<br />    [4] => 230<br />    [5] => 150<br />    [6] => 135<br />    [7] => 97<br />    [8] => 98<br />    [9] => 99<br />)<br /><br />

            foreach (var c in UTF8Encoding.UTF8.GetBytes("中文abc"))<br />            {<br />                Console.WriteLine(c);<br />            }<br />

$s = '中文abc';<br />$s = iconv('gbk', 'utf-8', $s); //不是 utf-8 时需转 utf-8<br />print_r(unpack('C*', $s));

Array<br />(<br />    [1] => 228<br />    [2] => 184<br />    [3] => 173<br />    [4] => 230<br />    [5] => 150<br />    [6] => 135<br />    [7] => 97<br />    [8] => 98<br />    [9] => 99<br />)<br /><br />

            foreach (var c in UTF8Encoding.UTF8.GetBytes("中文abc"))<br />            {<br />                Console.WriteLine(c);<br />            }<br />