Question

如何使用javascript和php检查签名，像这样？

首先，用户会将数据填入输入username和password

如果username和password更正，那么它会提醒SUCCESS

但是username或password不正确，它会提醒FAIL

我测试了我的代码，但没有工作。我怎么能这样做？

HTML

<form method="post" action="" ENCTYPE = "multipart/form-data" onsubmit="return checkform(this);" id="sign_in_fid">
    <label>
        Your Username
    </label>
    <input type="text" name="username" id="username">
    <br> 
    <label>
        Your Password
    </label>
    <input type="password" name="password" id="password">
    <br>       
    <br> 
<input name="submit" type="submit" value="Sign in"/>
</form>

JAVASCRIPT

<script language="JavaScript" type="text/javascript">
function checkform ( form )
{
  var username_val = document.getElementById("username").value;
  var password_val = document.getElementById("password").value;         
</script>


<?PHP
    include("connect.php");
    $strUsername = "<script>document.writeln(username_val);</script>";
    $strPassword = "<script>document.writeln(password_val);</script>";

    $sql = "SELECT * FROM av8_users WHERE BINARY username = '$strUsername' and password = '$strPassword'";
    $result=mysql_query($sql);
    $row=mysql_fetch_array($result);
    $active=$row['active'];
    $count=mysql_num_rows($result);
    if($count==1)
        {
?>
            <script>
            alert("SUCCESS");
            </script>
<?PHP
        }
    else 
        {
?>
            <script>
            alert("FAIL");
            </script>
<?PHP
        }
?>
<script>
return true ;
}
</script>

Answer 1

您的代码失败的原因是您在PHP代码中使用JavaScript。尝试更改

$strUsername = "<script>document.writeln(username_val);</script>";
$strPassword = "<script>document.writeln(password_val);</script>";

到

$strUsername = $_POST['username'];
$strPassword = $_POST['password'];

如何使用javascript和php检查签名，喜欢这个？

1 个答案: