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正则表达式证验老是失败

WBOY
WBOYOriginal
2016-06-13 12:47:211202browse

正则表达式验证老是失败

<body><br />
        <?php<br />
        if(!empty($_POST[sub]))<br />
        {<br />
            <br />
        if(ereg("\d{10}", $_POST[username]))<br />
        <br />
        {echo "验证通过。";}<br />
        else<br />
        {echo "验证失败";}<br />
        }<br />
        ?><br />
        <form action="" method="post"><br />
    用户名<input type="text" name="username"><br><br />
    <input type="submit" name="sub" value="提交"><br />
</form><br />
    </body>

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