multi_byte_string

$ php -v
PHP 5.2.10 (cli) (built: Jun 21 2009 11:10:43)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
$ php -a
php > $string = "webデザイン97";
php > echo $string[0];
w
php > echo $string[1];
e
php > echo $string[2];
b
php > echo $string[3];
・
php > echo $string[4];

php > echo $string[5];

php > echo $string[6];
・
php > echo $string[7];

php > echo $string[8];
ｶ
php > echo $string[9];
・
php > echo $string[10];

php > echo $string[11];
､
php > echo $string[12];
・
php > echo $string[13];

php > echo $string[14];
ｳ
php > echo $string[15];
9
php > echo $string[16];
7
php > echo $string[17];
PHP Notice:  Uninitialized string offset: 17 in php shell code on line 1

Notice: Uninitialized string offset: 17 in php shell code on line 1
php >