如何使用 PHP 函数从数据库中检索数据？

mysqli_query(mysqli $link, string $query)

$link = mysqli_connect("localhost", "root", "password", "my_database");
$query = "SELECT * FROM users";
$result = mysqli_query($link, $query);

mysqli_fetch_row(mysqli_result $result)

while ($row = mysqli_fetch_row($result)) {
  echo $row[0] . " " . $row[1] . "\n";
}

mysqli_fetch_assoc(mysqli_result $result)

while ($row = mysqli_fetch_assoc($result)) {
  echo $row['name'] . " " . $row['email'] . "\n";
}

mysqli_fetch_array(mysqli_result $result)

while ($row = mysqli_fetch_array($result)) {
  echo $row[0] . " " . $row['name'] . "\n";
}

mysqli_num_rows(mysqli_result $result)

$num_rows = mysqli_num_rows($result);
echo "The number of rows in the result set is: " . $num_rows;