??      time003.php     
<html>
<head>
<title>9??????</title>
</head>

<body>
<h1>9.1???????????time()</h1>
<h3>time003.php???????</h3>
<?php
$a = 2000;//???????
$b = 12;//???????
$c = 24;//???????
echo $a . "?" . $b . "?" . $c . "??????????<br />";
echo mktime(0,0,0,$b,$c,$a);
?>
</body>
</html>