Check char size in utf8 encoding

Is there any simple solution to check on how m开发者_如何学编程any bytes are stored char in utf8.

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If you have a string, then :

• strlen() will give you the number of bytes it takes
• while mb_strlen() will give you the number of characters it contains

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strlen() returns the number of bytes. mb_strlen() returns the number of multibyte characters.