php man page for mb_strlen

MB_STRLEN(3)								 1							      MB_STRLEN(3)

mb_strlen - Get string length

SYNOPSIS
       mixed mb_strlen (string	$str, [string  $encoding = mb_internal_encoding()])

DESCRIPTION
	Gets the length of a string.

PARAMETERS
	      o $str
		- The string being checked for length.

	      o $encoding
		-The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.

RETURN VALUES
	Returns the number of characters in string$str having character encoding $encoding. A multi-byte character is counted as 1.

	Returns FALSE if the given $encoding is invalid.

       Warning

	      This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on
	      Booleans for more information. Use the === operator for testing the return value of this function.

SEE ALSO
       mb_internal_encoding(3), grapheme_strlen(3), iconv_strlen(3), strlen(3).

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