can'；t使用isset php访问数据库
我正在尝试从我的数据库中获取数据，但我无法这样做。有时我没有得到任何结果，有时我没有按下提交按钮就失败了。请看一下这个代码。我知道我做错了什么，但我无法解决它，因为我是一个新手，正在学习过程中。请看一下我的html和php。虽然与DB的连接没有错误，但我已经三次检查了它的工作情况，以便与DB建立连接。这是我的php代码can'；t使用isset php访问数据库,php,html,mysql,authentication,Php,Html,Mysql,Authentication,我正在尝试从我的数据库中获取数据，但我无法这样做。有时我没有得到任何结果，有时我没有按下提交按钮就失败了。请看一下这个代码。我知道我做错了什么，但我无法解决它，因为我是一个新手，正在学习过程中。请看一下我的html和php。虽然与DB的连接没有错误，但我已经三次检查了它的工作情况，以便与DB建立连接。这是我的php代码 <?php if (isset($_POST['login'])) { include "config.php"; $username=
<?php
if (isset($_POST['login']))
{
include "config.php";
$username=mysqli_real_escape_string ($conn,$_POST['user']);
$password=$_POST['user'];
$sql="SELECT username, password FROM user WHERE username='{$username}' AND password='{$password}'";
$result = mysqli_query($conn,$sql) or die("Query failed");
if (mysqli_num_rows($result)>0)
{
while( $row=mysqli_fetch_assoc($result))
{
echo "Successful";
}
}
else
{
echo 'failed ';
}
}
?>
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<!-----start-main---->
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<input type="text" name="user" class="text" placeholder="Email" onfocus="this.value = '';" onblur="if (this.value == '') {this.value = 'Email';}" ><a href="#" class=" icon user"></a>
</li>
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<input type="password" name="" placeholder="Password" onfocus="this.value = '';" onblur="if (this.value == '') {this.value = 'Password';}"><a href="#" class=" icon lock"></a>
</li>
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<a href="/">Forgot Password?</a>
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<input type="submit" name="login" value="LOG IN" >
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</div>
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<input type="email" name="email" class="form-control" placeholder="E-mail" required>
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$password=$_POST['user'];
<?php
/* Connecting to DB */
$ConnectionSQL = new mysqli ('localhost', 'put_user_db', 'put_pass_db', 'database_to_connect');
/*If connection error*/
if ($ConnectionSQL->connect_error) {
die('Connection Error (' . $ConnectingSQL->connect_errno . ') '
. $ConnectingSQL->connect_error);
}
/*If Connection succesfull, show host info*/
echo '<p>Connection established: '. $ConnectingSQL->host_info.'</p>';
echo '<p>Server '.$ConnectionSQL->server_info.'</p>';
<input type="password" name="password"
$password= $_POST['password'];