Php 显示数据库中的数组

我有这个数据库

id | domain    | whois_server         |
---------------------------------------
1  | ac        | whois.nic.ac         |
2  | ae        | whois.nic.ae         |
3  | id        | whois.pandi.or.id    |

如何显示没有id的数组

array (
    'ac' => 'whois.nic.ac',
    'ae' => 'whois.nic.ae',
    'id' => 'whois.pandi.or.id',
)

我已经完成了以下代码：

$sql = "SELECT * FROM whois_server ";
$result = $db->prepare($sql);
$result->execute();
while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
    $whoisservers =  array_merge($whoisservers, array_map('trim', explode(",", $row[1])));
}

但似乎是：

array (
    [0] => whois.nic.ac
    [1] => whois.nic.ae
    [2] => whois.pandi.or.id
)

---

在循环中，可以为每个值向

$whoisseervers

变量添加键：

$sql = "SELECT domain, whois_server FROM whois_server";
$result = $db->prepare($sql);
$result->execute();

$whoisservers = [];
while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
    $whoisservers[$row['domain']] =  $row['whois_server'];
}

print_r($whoisservers);

会更简单（更清晰）

---

如注释中所述，在SQL中不要选择不需要的字段。

通过将索引按

$row['domain']

和值按

$row['whois\u server']

添加到

$whoisservers

数组中

$whoisservers = [];
$sql = "SELECT * FROM whois_server ";
$result = $db->prepare($sql);
$result->execute();
while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
    $whoisservers[$row['domain']] =  $row['whois_server'];
}
print_r($whoisservers);

---

与使用

fetchAll

和

PDO:：FETCH_KEY_PAIR

的其他答案解决方案略有不同：

$sql = "SELECT domain, whois_server FROM whois_server";
$result = $db->prepare($sql);
$result->execute();
$whoisservers = $result->fetchAll(PDO::FETCH_KEY_PAIR);
print_r($whoisservers);

---

为什么不使用此查询

从whois\u服务器中选择域、whois\u服务器

？

$sql = "SELECT * FROM whois_server ";
$result = $db->prepare($sql);
$result->execute();
$dataReturn = [];
while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
      $dataReturn[$row['domain']] = $row['whois_server'];
}
print_r($dataReturn);

$sql = "SELECT domain, whois_server FROM whois_server";
$result = $db->prepare($sql);
$result->execute();
$whoisservers = $result->fetchAll(PDO::FETCH_KEY_PAIR);
print_r($whoisservers);