php unicode编码实现
2018-03-28 17:16:48public static function unicode_encode($str)
{
if(!isset($str) || $str === '') { return $str; }
$str = iconv('UTF-8', 'UCS-2', $str);
$len = strlen($str);
$new = '';
for ($i = 0; $i < $len - 1; $i = $i + 2) {
$c = $str[$i];
$c2 = $str[$i + 1];
if (ord($c) > 0)
{ // 两个字节的文字
$new .= sprintf('\\\u%02s%02s', base_convert(ord($c), 10, 16), base_convert(ord($c2), 10, 16));
}
else
{
$new .= sprintf('\\\u%04s',base_convert(ord($c2), 10, 16));
}
}
return $new;
}