if($UploadFile_size <1024)
//上载文件大小
{
$FileSize = (string)$UploadFile_size . "字节";
}
elseif($UploadFile_size <(1024 * 1024))
{
$FileSize = number_format((double)
($UploadFile_size / 1024), 1) . " KB";
}
else
{
$FileSize = number_format((double)
($UploadFile_size / (1024 * 1024)), 1) . " MB";
}
number_format函数起到格式化输出的作用，具体用法请参照手册
下一步
我们必须考虑到文件已经存在和拷贝操作失败的情况，并提
供相应的提示信息
if(!file_exists($FileName))
{
if(copy($UploadFile,$FileName))
{
echo "文件 $UploadFile_name
($FileSize)上载成功！";
}
else
{
echo "文件 $UploadFile_name上载失败！";
}
unlink($UploadFile);
}
else
{
echo "文件 $UploadFile_name已经存在！";
}
然后
我们应该考虑到大文件上载时容易出现超时的情况，可以用
set_time_limit($TimeLimit);加大超时限制时间。
最后，把截面和实现代码综合到一个单独的文件中，为了实现这
个想法，
我们通过在 form中添加一个隐含值
<INPUT TYPE = "hidden" NAME = "UploadAction" VALUE = "1">指出
当前的状态（界面或实现），以便区分对待完成代码如下
（文件名upload.php3）
<?
if(!$UploadAction):
?>
<HTML>
<HEAD>
<TITLE>文件上载界面</TITLE>
</HEAD>
<BODY><TABLE><CENTER>
<FORM ENCTYPE = "multipart/form-data" NAME = "SubmitForm"
ACTION = "upload.php3" METHOD = "POST">
<INPUT TYPE = "hidden" NAME = "MAX_FILE_SIZE" VALUE ="1000000">
<INPUT TYPE = "hidden" NAME = "UploadAction" VALUE = "1">
<TR>
<TD><INPUT NAME = "UploadFile" TYPE = "file" SIZE = "30"></TD>
</TR>
<TR>
<TD><INPUT NAME = "submit" VALUE = "提交" TYPE = "submit"></TD>
<TD><INPUT NAME = "reset" VALUE = "重置" TYPE = "reset"></TD>
</TR>
</FORM></CENTER></TABLE></BODY>
</HTML>
<?
else:
?>
<HTML>
<HEAD>
<TITLE>文件上载代码</TITLE>
</HEAD>
<BODY>
<?
$UploadAction=0;
$TimeLimit=60; /*设置超时限制时间
缺省时间为 30秒
设置为0时为不限时 */
set_time_limit($TimeLimit);
If(($UploadFile != "none")&&
($UploadFile != ""))
{
$UploadPath = AddSlashes(dirname($PATH_TRANSLATED))."\\upload\\";
//上载文件存放路径
$FileName = $UploadPath.$UploadFile_name; //上载文件名
if($UploadFile_size <1024) //上载文件大小
{
$FileSize = (string)$UploadFile_size . "字节";
}
elseif($UploadFile_size <(1024 * 1024))
{
$FileSize = number_format((double)($UploadFile_size / 1024), 1) . " KB";
}
else
{
$FileSize = number_format((double)($UploadFile_size/(1024*1024)),1)."MB";
}
if(!file_exists($FileName))
{
if(copy($UploadFile,$FileName))
{
echo "文件 $UploadFile_name ($FileSize)上载成功！";
}
else
{
echo "文件 $UploadFile_name上载失败！";
}
unlink($UploadFile);
}
else
{
echo "文件 $UploadFile_name已经存在！";
}
}
else
{
echo "你没有选择任何文件上载！";
}
set_time_limit(30); //恢复缺省超时设置
?>
<BR><A HREF = "upload.php3">返回</A>
</BODY>
</HTML>
<?
endif;
?>
