源碼：
@header("content-Type: text/html; charset=utf-8");
$demon = 'm.miracleart.cn';
$Chinese = 'PHP中文網(wǎng)';
echo strlen($demon),'<hr>';
echo strlen($Chinese),'<hr>';
echo mb_strlen($demon),'<hr>';
echo mb_strlen($Chinese),'<hr>';
echo mb_strwidth($demon),'<hr>';
echo mb_strwidth($Chinese),'<hr>';
輸出：
10
12
10
12##%
0
0
0
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