[英]Unable to get results from MySQL query in PHP
I'm unable to get results from a MySQL query in PHP. 我无法从PHP中的MySQL查询获得结果。 I've tried
get_result()
and bind_param()
. 我已经尝试过
get_result()
和bind_param()
。 However, this ends up breaking my script and I'm unable to echo any of the results for testing. 但是,这最终破坏了我的脚本,并且我无法回显任何测试结果。
My table has three columns: username, password, and email. 我的表有三列:用户名,密码和电子邮件。
$usernameprep = $conn->prepare("SELECT 1, password FROM `table` WHERE username=?");
$usernameprep->bind_param("s", $_POST['username']);
$usernameprep->execute();
$usernameprep->bind_results($userexists, $userpass);
$usernameprep->close();
What I've tried: 我尝试过的
get_result()
and bind_param()
get_result()
和bind_param()
bind_param()
after AND before execute()
bind_param()
放在AND之后,然后execute()
$user
and $userpass
, only for my script to break afterwards $user
和$userpass
,仅用于我的脚本随后中断 Note: I am used to SQLite3, so I'm still getting used to how MySQL works. 注意:我已经习惯了SQLite3,所以我仍然习惯于MySQL的工作方式。
UPDATE: adding code for my connection for reference 更新:为我的连接添加代码以供参考
$host = 'localhost';
$user = 'root';
$password = 'root';
$db = 'database';
$conn = new mysqli($host, $user, $password, $db);
// Check connection
if ($conn->connect_error) {
echo "Connection Error, please try again.";
die("Connection failed: " . $conn->connect_error);
}
Updated 更新
echo 'Here is your post data. Make sure you have your username.<br>';
echo '<pre>';
print_r($_POST);
echo '</pre>';
$query = "SELECT password FROM `table` WHERE username=?";
$stmt = $conn->prepare($query);
$stmt->bind_param("s", $_POST['username']);
$stmt->execute();
echo("Error description: " . mysqli_error($conn)); //This will show you your errors after the execute();
$results = $stmt->get_result();
if($results->num_rows !== 0){
while($row = $results->fetch_assoc()){
$data[] = array(
'userexists' => 1,
'userpass' => $row['password']
);
}
}else{
echo "Your query failed to find any data.";
}
$stmt->close();
echo '<pre>';
echo 'Here is your data:<br>';
print_r($data);
echo '</pre>';
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