mb_convert_kana

Function name: mb_convert_kana()

Applicable version: PHP 4 >= 4.0.6, PHP 5, PHP 7

Usage: mb_convert_kana(string $str [, string $option = "KV" [, string $encoding = mb_internal_encoding() ]]): string

Description: The mb_convert_kana() function is used to convert half-width characters in a string into full-width characters, or to convert full-width characters into half-width characters.

parameter:

• $str: The string to be converted.
• $option: Optional parameter, specifying the conversion method. The default is "KV", which means converting half-width Katakana to full-width Katakana and full-width British digits to half-width. Other optional values ​​are:
  • "K": Convert half-width Katakana to full-width Katakana.
  • "V": Convert full-width Katakana to half-width Katakana.
  • "a": Convert full-width English numbers into half-width.
  • "A": Convert half-width English numbers to full-width.
  • "n": No conversion is made.
• $encoding: Optional parameter, specify character encoding. The default value is mb_internal_encoding(), which is the current internal character encoding.

Return value: Returns the converted string.

Example:

 $str = "ｈｅｌｌｏ，ｗｏｒｌｄ！"; $result = mb_convert_kana($str, "a"); echo $result; // 输出：hello, world!

 $str = "こんにちは、世界！"; $result = mb_convert_kana($str, "K"); echo $result; // 输出：?????、世界！

 $str = "????"; $result = mb_convert_kana($str, "K"); echo $result; // 输出：カタカナ

Notes:

• The mb_convert_kana() function is a multibyte character encoding function that requires setting the correct internal character encoding through mb_internal_encoding() before use.
• Please make sure that the encoding of the string is consistent with the specified character encoding to avoid garbled code problems.
• This function is only suitable for handling Japanese characters.