Editing Simple data anonymization (section)

=== case1: 王小明 --> 王O明; 孤獨求敗 --> 孤OO敗 ===
Reserve the first and last characters of name, and replace other characters with the symbol 'OO'.

ex: 
* 楊過 --> 楊O
* 王小明 --> 王O明
* 孤獨求敗 --> 孤OO敗
* Guo da-xia --> GOOOOOOOOa

methods:
* Excel: 
** {{kbd | key=<nowiki>=IF(LEN(A1)=2, LEFT(A1, 1)&"O", LEFT(A1, 1)&REPT("O", LEN(A1)-2)&RIGHT(A1, 1))</nowiki>}}
** {{kbd | key=<nowiki>=REPLACE(A1, 2, 1, "O")</nowiki>}}<ref>[http://blog.xuite.net/yh96301/blog/80724141-Excel+2010%E5%A7%93%E5%90%8D%E7%9A%84%E7%AC%AC%E4%BA%8C%E5%80%8B%E5%AD%97%E5%8F%96%E4%BB%A3%E7%82%BAO Excel 2010姓名的第二個字取代為O @ 軟體使用教學 :: 隨意窩 Xuite日誌]</ref>  {{exclaim}} only applied for 3 characters, NOT for 4 characters
* PHP: using regular_replace
<pre>
if(mb_strlen($string, "UTF-8") == 2){
   echo mb_substr($string, 0, 1, "UTF-8") . "O";

}else{
  $pattern = '/^(\X)(\X+)(\X)/u';
  preg_match($pattern, $string, $matches);
  echo $matches[1]. str_repeat("O", mb_strlen($string, "UTF-8") - 2) . $matches[3];

}
</pre>
* MySQL: 
<pre>
SET @name := "楊過";
-- SET @name := "王小明";
-- SET @name := "孤獨求敗";
-- SET @name := "Guo da-xia";

SELECT CASE  
    WHEN CHAR_LENGTH(@name) =2 THEN CONCAT(LEFT(@name, 1), 'O')
    ELSE CONCAT(LEFT(@name, 1), REPEAT('O', CHAR_LENGTH(@name)-2), RIGHT(@name, 1))
    END;
</pre>