php - PHP Convert Double Byte String to Single Byte String?

Question

I have a string with double byte, now I want convert to 1 byte.

Example:

$input = "２０１２／１２／３１";

I want to output: 2012/12/31

For C#: How to Convert Double Byte String to Single Byte String?

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Found the anwser from:

how to transform japanese english character to normal english character?

However mb_convert_kana in my pc not run

mb_convert_kana("２０１２／１２／３１", "rnaskhc");

Answer 1

您正在寻找功能mb_convert_kana，最有可能使用模式as（zen-kaku 字母数字和空格到 han-kaku）。“双字节”是错误的术语，它们是全角字符。