填空题
1.<?php
$str = "Hello,China";
echo strlen($str);
?>
结果是?______
2.<?php
$str = "您好,中国!";
echo mb_strlen($str,’UTF-8’);
?>
结果是?______
3.<html>
<meta charset="utf-8">
<body>
<?php
$name="鸣人";
print "姓名的长度为:".strlen($name);
?>
</body>
</html>
结果是?___________
4.<html>
<meta charset="utf-8">
<body>
<?php