What does PHP mean to not support Unicode?

PHP's official manual says: "PHP can only support a 256 character set, so Unicode is not supported." "What does that mean?" Why can't I support Unicode?

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PHP's official manual says: "PHP can only support a 256 character set, so Unicode is not supported." "What does that mean?" Why can't I support Unicode?

This just means that the string type of PHP is array of bytes.

PHP can use Unicode as normal. My experience is:

• The php script file itself uses the UTF-8 character set.
• The Web page uses UTF-8 encoding.
• The MySQL database uses the UTF8 character set.
• Various string operations use the multibyte string series function.

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