Fatal error: Uncaught Error: Call to a member function fetch_object() on string

Question

We are currently running into an issue when we try and get the username from a SQL database. This is our code for the query and the fetch_object()

<?php  



$user = 'root';

$password = 'root';

$db = 'collabowrite';

$host = 'localhost';

$port = 3306;

$conn = new mysqli($host, $user, $password, $db);

// Check connection

if ($conn->connect_error) {

    die("Connection failed: " . $conn->connect_error);

} 

// $link = mysqli_init();

// $success = mysqli_real_connect(

//    $link, 

//    $host, 

//    $user, 

//    $password, 

//    $db,

//    $port

// );



//$sql='SELECT * FROM users WHERE username ='.$_GET['username'];







$result = $conn->query('SELECT * FROM users WHERE username ="'.$_POST['username']).'"';

if(!$result){

    die($conn->error);  

}

$userids = array();



while ($row = $result->fetch_object()){

    $userids[] = $row->id;

}





echo $userids[0];



$conn->close();



?>

When we run this we get the error:

Fatal error: Uncaught Error: Call to a member function fetch_object() on string in /Users/brianleaf/Google Drive/htdocs/login.php:34 Stack trace: #0 {main} thrown in /Users/brianleaf/Google Drive/htdocs/login.php on line 34

We are new to PHP so any help would be appreciated.

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Answer 1

It looks like you have the quote on the outside of that last ) on line 34 rather than on the inside.

Try, for example:

$sql='SELECT * FROM users WHERE username ="'.$_POST['username'].'"';
$result = $conn->query($sql);

or

$result = $conn->query('SELECT * FROM users WHERE username ="'.$_POST['username'].'"');

Fatal error: Uncaught Error: Call to a member function fetch_object() on string

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