我正在为我的php服务器使用000webhost,为我的数据库使用phpmyadmin。我正在尝试这样做,当您输入用户名时,它会输出密码。任何人都可以给我一些建议吗?那太好了!
我的HTML:
<!DOCTYPE html>
<html>
<body>
<form action="Login.php" method="GET">
<input type="text" name="query" />
<input type="submit" value="Search" />
</form>
</body>
</html>
我的php:
<?php
$host='localhost';
$user='id1783920_123456';
$pass='';
$db='id1783920_mydb';
/* $pass is the password and I know that's not the problem, I just don't want to share it */
$con=mysqli_connect($host,$user,$pass,$db);
if($con) {
echo 'connected successfully to id1783920_mydb database';
}
$term = $_GET['query'];
$sql = "SELECT password FROM Signup WHERE CONCAT( username) LIKE '%$term%'";
$result = $con->query($sql);
if ($result->num_rows > 0) {
$row = $result->fetch_assoc()
echo "password: " . $row["password"];
} else {
echo "0 results";
}
$conn->close();
?>
答案 0 :(得分:0)
你可以试试这个。
$mysqli = new mysqli($host,$user,$pass,$db);
if ($mysqli->connect_errno) {
//error
}
$sql = "SELECT password FROM your_table WHERE user = $name";
if (!$result = $mysqli->query($sql)) {
//something didn't go right
}
if ($result->num_rows === 0) {
//no result
}
//you should have the password in here
$password = $result->fetch_assoc();
$result->free();
$mysqli->close();
连接到数据库后,您应检查是否实际建立了连接,如果没有,您会收到哪些错误:
if ($mysqli->connect_errno) {
var_dump($mysqli->connect_errno);
var_dump($mysqli->connect_error);
}
您需要在某处编写SQL,无论是在变量中还是直接在查询中。
$sql = "SELECT password FROM your_table WHERE user = $name";
$mysqli->query($sql)
- 这将执行查询。如果您的代码最终出现在我提供的if
中,那就出错了。因此,您可以在那里设置打印以查看错误。
if (!$result = $mysqli->query($sql)) {
var_dump($mysqli->connect_errno);
var_dump($mysqli->connect_error);
}
检查是否有任何结果。
if ($result->num_rows === 0) {
echo "No results";
}
$result->fetch_assoc();
- 这将“获取”结果。您可以将其设置为变量:
$password = $result->fetch_assoc();
然后不要忘记释放结果并关闭连接:
$result->free();
$mysqli->close();
答案 1 :(得分:0)
您的PHP文件应如下所示:
<?php
$host='localhost';
$user='id1783920_123456';
$pass='';
$db='id1783920_mydb';
$con=mysqli_connect($host,$user,$pass,$db);
if($con) {
echo 'connected successfully to id1783920_mydb database';
}
$term = $_GET['query'];
$sql = "SELECT password FROM Signup WHERE CONCAT( username) LIKE '%$term%'";
$result = $con->query($sql);
if ($result->num_rows > 0) {
$row = $result->fetch_assoc();
echo "password: " . $row["password"];
} else {
echo "0 results";
}
$conn->close();
?>
快乐的编码!