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<form action="f.php" method="post">
<input name="files" type="file" />
<input type="hidden" name="add" value="ok">
<input type="submit" value="ÉÏ´«">
</form>

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$vars=register_globals_vars();    //×¢²áÈ«¾Ö±äÁ¿£¬ÎªÁËʹÓÃ$var²»±»Òç³ö

if(chkArray($vars,"add")=="ok")
{

echo chkArray($vars,"files");
echo " <br>";

echo $_FILES["files"]["name"];      ->¾ÍÊÇÕâÀïÌáʾ䶨Òå

  if(isset($_FILES["files"]))      ->ÕâÀï¾ÓÈ»ÊǿյÄ,  »»³ÉÕâ¸öisset($_FILES[chkArray($vars,"files")])ÒÀÈ»ÊÇ¿Õ    
  {
    echo "»ñÈ¡Îļþ";

  }
  else
  {
    echo "δ»ñÈ¡Îļþ";
  }
 
}

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Notice: Undefined index: files in D:\php\htdocs\demo\f.php on line 15
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phpʱ¼äÕýÔòÎÊÌâ - PHP / »ù´¡±à³Ì

PHP code:

$date = '2009-12-25';
$ptn = '/([\d]{4})[- \/](0?[\d]|1[0-2])[-\/ ](0?[\d]|[1-2][\d]|3[0-1])/';
if (preg_match($ptn,$date,$out))
{
print_r($out);exit();
}
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