Change fullwidth characters to halfwidth
javascript, php
Solution
In PHP, use `mb_convert_kana` to convert "zen-kaku" to "han-kaku".
Problem
``` "合同会社Ｋｎｏｗｌｅｄｇｅ Ｌｉｂｒａｒｙ" => "合同会社Knowledge Library" ``` I want to convert only alphanumeric characters in the string to single byte using java script or php