//字符串轉Unicode編碼
function unicode_encode($strLong) {
 $strArr = preg_split('/(?<!^)(?!$)/u', $strLong);//拆分字符串為數(shù)組(含中文字符)
 $resUnicode = '';
 foreach ($strArr as $str)
 {
   $bin_str = '';
   $arr = is_array($str) ? $str : str_split($str);//獲取字符內(nèi)部數(shù)組表示,此時$arr應類似array(228, 189, 160)
   foreach ($arr as $value)
   {
     $bin_str .= decbin(ord($value));//轉成數(shù)字再轉成二進制字符串,$bin_str應類似111001001011110110100000,如果是漢字"你"
   }
   $bin_str = preg_replace('/^.{4}(.{4}).{2}(.{6}).{2}(.{6})$/', '$1$2$3', $bin_str);//正則截取, $bin_str應類似0100111101100000,如果是漢字"你"
   $unicode = dechex(bindec($bin_str));//返回unicode十六進制
   $_sup = '';
   for ($i = 0; $i < 4 - strlen($unicode); $i++)
   {
     $_sup .= '0';//補位高字節(jié) 0
   }
   $str = '\\u' . $_sup . $unicode; //加上 \u 返回
   $resUnicode .= $str;
 }
 return $resUnicode;
}
//Unicode編碼轉字符串方法1
function unicode_decode($name)
{
 // 轉換編碼，將Unicode編碼轉換成可以瀏覽的utf-8編碼
 $pattern = '/([\w]+)|(\\\u([\w]{4}))/i';
 preg_match_all($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 $name;
}
//Unicode編碼轉字符串
function unicode_decode2($str){
 $json = '{"str":"' . $str . '"}';
 $arr = json_decode($json, true);
 if (empty($arr)) return '';
 return $arr['str'];
}

echo unicode_encode('若水小站:qq963087326'),'<br>';
//結果\u82e5\u6c34\u5c0f\u7ad9\u003a\u0071\u0071\u0039\u0036\u0033\u0030\u0038\u0037\u0033\u0032\u0036

echo unicode_decode('\u82e5\u6c34\u5c0f\u7ad9\u003a\u0071\u0071\u0039\u0036\u0033\u0030\u0038\u0037\u0033\u0032\u0036');
//結果若水小站:qq963087326