Call to a member function fetch_object() on a non-object
<p>When I load the PHP page containing the code below I get the error "Call to a member function fetch_object() on a non-object." It pertains to the line starting with the word while. Why is this error popping up? <b>Ignore my security weaknesses please.</b></p>

<p>PHP snippet:</p>

<pre><code>header('Content-Type:application/json;charset=utf-8');

$file_absolute = "---placeholder for correct file path---";
include_once($file_absolute);
$mysql = new mysqli($db_host, $db_username, $db_password, $db_name);
$verb_value = $_POST['verb_value'];

$mysql-&gt;query("SET CHARACTER SET 'utf8'");

$result = $mysql-&gt;query("SELECT present_tense FROM $verb_value");

$queryResult = array();

while ($row = $result-&gt;fetch_object())
{
    $queryResult[] = $row-&gt;present_tense;
}
</code></pre>
