Question

php无法通过$_POST从HTML的表单中获取数据

这是HTML代码中的表单代码：
<form class="form" action="logincheck.php" method="post">

<p class="name">
<input name="username" type="text" class="validate[required,custom[onlyLetter],length[0,100]] feedback-input" placeholder="Username" id="name" />
</p>

<p class="email">
<input name="password" type="password" class="validate[required,custom[email]] feedback-input" id="email" placeholder="Password" />
</p>
<br>

<div class="submit">
<input type="submit" name="submit" value="SEND" id="button-blue"/>
<div class="ease"></div>
</div>
</form>
这是logincheck.php的主要代码：
<?php
if(isset($_POST["submit"]) && $_POST["submit"] == "SEND")
{
$user = $_POST["username"];
$psw = $_POST["password"];
if($user == "" || $psw == "")
{
echo "<script>alert('Your username or password is empty!'); history.go(-1);</script>";
}
else
{
mysql_connect("localhost","root","sixx");
mysql_select_db("vt");
mysql_query("set names 'gbk'");
$sql = "select username,password from user where username = '$_POST[username]' and password = '$_POST[password]'";
$result = mysql_query($sql);
$num = mysql_num_rows($result);
if($num)
{
$row = mysql_fetch_array($result); //灏嗘暟鎹互绱一紩鏂瑰纺鍌ㄥ瓨鍦ㄦ暟缁勪腑
echo $row[0];
}
else
{
echo "<script>alert('Your username or password is error.Please enter again!');history.go(-1);</script>";
}
}
}
else
{
echo "<script>alert('Something error!'); history.go(-1);</script>";
}

?>

求大神解答！

Answer 1

if(isset($_POST["submit"]) && $_POST["submit"] == "SEND") 这句有问题吧

<div class="submit">
<input type="submit" name="submit" value="SEND" id="button-blue"/>
<div class="ease"></div>

name 是submit 你用SEND 是这么意思

追问

可是就连这个的post获取的也是空值啊

Name:

php中You are .

追答

我刚才测试了 你写的那个是对的，我一般用$_SERVER(REQUEST_METHOD)="POST";
你把代码简化一下就一目了然了。

alert('Your username or password is empty!'); history.go(-1);";
} else{
echo "获得数据$user$psw";
}
}
?>
PHP页面只要这么多，就看出来了。
你是不是数据库部分写错了。

Answer 2

逐步测试，先测试能否获取submit的值先。