Warning: mysqli_stmt::bind_param(): Number of elements in type definition string doesn't match number of bind variables 11 [closed]

php mysql mysqli

PHP Snippet 1:

$result = $db->prepare("INSERT INTO links VALUES (NULL, ?, ?, ?)");

$result->bind_param('sss', $url, $title, $ltime);

PHP Snippet 2:

$result->bind_param('ss', $url, $title, $ltime);

PHP Snippet 3:

$result->bind_param('sss', $url, $title, $ltime);