Question

我有一个存储服务器地址的数组

$servers = array(
  'UK'=>array(
    'voi' =>  '54.53.23.32',
    'gps' =>  '55.65.34.34',
    'sos' =>  '54.54.34.23'
  ),
  'USA'=>array(
    'voi' =>  '12.23.45.67',
    'gps' =>  '65.443.23.45',
    'sos' =>  '12.23.456.4'
  )
);

我有一个列出服务器位置的表单

<select name="server" id="server">
<?php foreach($servers as $key => $arr){
echo "<option>" .$key. "</option>"; }
?>
</select>

提交表单后，我需要使用正确的国家/地区IP

设置会话变量

$_SESSION['voi']=$submitted_countrys_voi_ip;
$_SESSION['gps']=$submitted_countrys_gps_ip;

等。

如何根据表单发布选择正确的密钥，并将子数组中的值转换为会话变量？

Answer 1

首先，您选择没有值。所以先修复了

<select name="server" id="server">

    <?php foreach($servers as $key => $arr){
    echo "<option value='$key'>" .$key. "</option>"; }
    ?>

</select>

然后，提交表单后。 ^{假设使用POST方法提交表单}

$server = ..; //Being your array of ips
$sub_server = $_POST['server']; //get the submitted server
$_SESSION['voi'] = $server[$sub_server]['voi'];
$_SESSION['gps'] = $server[$sub_server]['gps'];
// and so on

改进

如果你有一个国家的大量IP，那么你可能想先创建一个类型的数组。

$server = ..; 
$types = array('voi','gps', 'sos'); //TYPES in a single array
$sub_server = $_POST['server']; 
foreach($types as $type) {
    $_SESSION[$type] = $server[$sub_server][$type];
}

这会自动分配每种类型。

Answer 2

假设您正在使用<form method="POST"，您可以执行类似

的操作

if ( isset($_POST['server']) ) {
  $key = $_POST['server'];
  if ( !isset( $servers[$key] ) {
    die('unknown server');
  }
  $_SESSION['server'] = $servers[$key];
  echo 'voi=', $_SESSION['server']['voi'];
}
else {
  die('no server key found in request');
}

Answer 3

试试这个：

$_SESSION['voi']=$servers[$_POST['server']]['voi'];
$_SESSION['gps']=$servers[$_POST['server']]['gps'];

Answer 4

$country = $_POST['server'];
if (isset($servers[$country])) {
  $_SESSION['voi'] = $servers[$country]['voi'];
  $_SESSION['gps'] = $servers[$country]['gps'];
}
else {
  // Unknown country
}

从表单发布搜索数组键并获取子数组

4 个答案:

改进