日期:2014-01-16  浏览次数:20615 次

<html>
<head>
    <title>Untitled</title>
</head>

<body>
<?php
$in="2344";
if(ereg("^(-{0,1}|\+{0,1})[0-9]+(\.{0,1}[0-9]+)$",$in))
    echo "Ok!";
else
    echo "Sorry,Please input again!";
?>
<br>很简单的嘛!

</body>
</html>