PHP 数组 :在具有选项值的表单中回显$var

语句末尾没有双引号和分号。

 <?php 
$team = $_POST['team'];
$result =    file_get_contents("http://nhlwc.cdnak.neulion.com/fs1/nhl/league/teamroster/$team/iphone/clubroster.json");
$json = json_decode($result);
$goalies = $json->goali;
foreach ($json->goalie as $player) {
    echo "<option value='"".$player->name."'">".$player->name."</option>";
}
?>

这个$json->goalie值是多少 foreach ，改用$goalies

<?php 
$team = $_POST['team'];
$result = file_get_contents("http://nhlwc.cdnak.neulion.com/fs1/nhl/league/teamroster/$team/iphone/clubroster.json");
$json = json_decode($result);
$goalies = $json->goali;
foreach ($goalies as $player) 
{          
    echo "<option value='".$player->name."'>".$player->name."</option>";
}
?>

除了代码中明显的解析错误外，还需要注意以下一些其他事项：

$team = $_POST['team'];
$result = file_get_contents("http://nhlwc.cdnak.neulion.com/fs1/nhl/league/teamroster/$team/iphone/clubroster.json");

你不能只在这样的URL中使用$team，你应该对它进行编码：

$url = sprintf("http://nhlwc.cdnak.neulion.com/fs1/nhl/league/teamroster/%s/iphone/clubroster.json",
    urlencode($team)
);
$result = file_get_contents($url);
$json = json_decode($result);
foreach ($json->goalie as $player) {
    echo "<option value='"".$player->name."'">".$player->name."</option>";
}

您应该始终在输出中转义变量：

    printf('<option value="%s">%1$s</option>',
        htmlspecialchars($player->name, ENT_QUOTES, 'UTF-8')
    );

1. 我建议将JSON解码为数组，而不是对象，这样更容易使用。
2. 您没有在上面的代码中使用 goalies 变量，我假设这就是您想在 foreach 语句中使用的变量？
3. 错误检查将是一个好主意

如果是这样，那么您的代码可能如下所示：

<?php
    $team = $_POST['team'];
    $result = file_get_contents("http://nhlwc.cdnak.neulion.com/fs1/nhl/league/teamroster/$team/iphone/clubroster.json");
    $json = json_decode($result, true);
    $goalies = array();
    if (!empty($json['goali'])) {
        $goalies = $json['goali'];
    }
    foreach ($goalies as $player) {
        echo '<option value="' . $player['name'] . '">' . $player['name'] . '</option>'
    }
?>

在字符串中显示变量，请始终使用"来显示变量。您可以按以下方式修改代码：

echo "<option value='{$player->name}'>{$player->name}</option>";

所以永远记住：1. 您可以在"（双引号）中使用"（单引号）"<</p>

与其写问题是什么，我认为只是向您展示并为您提供一些指示会更有帮助：

// Make sure all errors are displayed
error_reporting(E_ALL);
ini_set('display_errors', 1);
// Get the team variable and make sure that it was set
$team = filter_input(INPUT_POST, 'team', FILTER_UNSAFE_RAW);
if ($team === null) {
    die('Error: The "team" POST variable is not set, cannot continue');
}
// Since you are using the variable inside a URL it makes
// sense to remove potentially unsafe characters; or in
// other words, only preserve characters that are allowed.
// Encoding the variable, as in Ja͢ck's answer, is also an option.
$team = preg_replace('/[^a-zA-Z0-9_-]/', null, $team);
if ($team === "") {
    die('Error: The "team" variable is empty, cannot continue');
}
// Construct the URL
$url = "http://nhlwc.cdnak.neulion.com/fs1/nhl/league/teamroster/{$team}/iphone/clubroster.json";
// Grab the data from the website
$data = file_get_contents($url);
if ($data === false) {
    die('Error: Could not grab the data from the URL, cannot continue');
}
// Attempt to decode the data
$json = json_decode($data);
if (json_last_error() !== JSON_ERROR_NONE) {
    die('Error: There was a JSON error ('.json_last_error_msg().'), cannot continue');
}
// Since we are expecting an object we should check for it
// before using it
if ( ! is_object($json)) {
    die('Error: The JSON was decoded, but is not an object, cannot use it...');
}
// If the following code gives you problems then read the error
// message, try to understand what it says, and then google it if
// you are getting nowhere
$goalies = $json->goali;
foreach ($json->goalie as $player) {
    echo "<option value='"".$player->name."'">".$player->name."</option>";
}