在數組中打印字段值

Question

我正在使用此處找到的教程來顯示基於Drupal中的Google Maps Directions API的路線。 我的節點中有兩個字段-originfield和destinationfield。 它們每個都包含一個城市的名稱。

問題是我無法在$ params數組內打印字段值。 這是完整的tpl.php代碼：

<?php
/**
 * @file
 * Returns the HTML for a node.
 *
 * Complete documentation for this file is available online.
 * @see https://drupal.org/node/1728164
 */
?>

<?php
// This print works:
print $node->field_originfield['und'][0]['value'];

    // Parameters used for the request
    $params = array(
        'origin'    => 'Tokyo, Japan', // I can't find a way to output the originfield's value here
        'destination'   => 'Kyoto, Japan' // I can't find a way to output the destinationfield's value here
    );

    // Join parameters into URL string
    foreach($params as $var => $val){
        $params_string .= '&' . $var . '=' . urlencode($val);  
    }

    // Request URL
    $url = "http://maps.googleapis.com/maps/api/directions/json?".ltrim($params_string, '&');

    // Make our API request
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $return = curl_exec($curl);
    curl_close($curl);

    // Parse the JSON response
    $directions = json_decode($return);

    // Show the total distance
    print('<p><strong>Total distance:</strong> ' . $directions->routes[0]->legs[0]->distance->text . '</p>');

?>

// This print works:
<?php
print $node->field_originfield['und'][0]['value'];
print $node->field_destinationfield['und'][0]['value'];
?>

如果我手動添加起點和終點，則一切正常。 但是，如果我使用以下任何一種組合，整個頁面要么混亂，要么不顯示任何內容，或者什么也沒有發生。

'origin'    => "<?php print $node->field_originfield['und'][0]['value']; ?>"
'origin'    => "print $node->field_originfield['und'][0]['value'];"
'origin'    => "$node->field_originfield['und'][0]['value'];"
'origin'    => "field_originfield['und'][0]['value'];"
'origin'    => "field_originfield;"
'origin'    => "<?php print render($content['originfield']); ?>"

我也嘗試過這個，沒有運氣：

$departure = print $node->field_originfield['und'][0]['value'];
$arrival = print $node->field_destinationfield['und'][0]['value'];

'origin' => 'departure',
'destination'   => 'arrival'

我在這里做錯了什么？

Answer 1

請嘗試以下方法：

$params = array(
    'origin'    => $node->field_originfield['und'][0]['value'],
    'departure' => $node->field_destinationfield['und'][0]['value']
);

要么

$departure = $node->field_originfield['und'][0]['value'];
$arrival = $node->field_destinationfield['und'][0]['value'];

$params = array(
    'origin' => $departure,
    'destination'   => $arrival
);

Answer 2

嘗試這個

$departure = $node->field_originfield['und'][0]['value'];
$arrival = $node->field_destinationfield['und'][0]['value'];

'origin' => $departure,
'destination'   => $arrival