php - MySQL从一列中选择所有数据

Question

我想选择所有的用户名。我试着做SELECT username FROM members然后mysql_fetch_array。所以我会这样做$data["username"]。但我也想单独选择每一行。任何有关如何执行此操作的帮助都会有所帮助，谢谢。

Answer 1

为此使用 PDO。使用 PDO 的示例

<?php
$stmt = $dbh->prepare("SELECT username FROM members");
if ($stmt->execute(array($_GET['username']))) {
  while ($row = $stmt->fetch()) {
    print_r($row);
  }
}
?>

Answer 2

遍历所有结果while()

$result = mysql_query('SELECT username FROM members');

while ($username = mysql_fetch_assoc($result)){
    echo $username['username']; //this will go for every result, so every row in the database
}

Answer 3

while($row = mysql_fetch_array($result))
  {
  echo $row['username'];
  }