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个位数格式化前面加零怎么处理

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Release: 2016-06-13 13:08:19
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个位数格式化前面加零怎么办?
循环中显示1、2、3、4。。。想显示成01、02、03、04。。。

怎么弄呢? ($no=0; $no++;显示的是单个的)

------解决方案--------------------
for($i=0;$i{
if($i echo "0" . $i;
else
echo $i;
echo "
";
}
?>
------解决方案--------------------
echo sprintf("%02s",5);
printf("%02s",9);

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