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.