how to properly use while loop in PDO fetchAll

Question

please be easy on me, i just started learning PDO and still finding my way how to convert my mysqli to PDO.

so i have a function to get the contents from my database

Answer 1

With fetchAll() you don't have to use while at all. As this function returns an array, you have to use foreach() instead:

function getContent() {
    $db = PDOconn();
    $query = "SELECT * FROM posts ORDER BY id DESC LIMIT 0,3";
    $sql = $db->prepare($query);
    $sql->execute();
    return $sql->fetchAll();
}

$data = getContent();
foreach($data as $row) {
    $id = $row['id'];
    $content = $row['content'];
}