计算距离时未定义的索引 - undefined index when calculating distance

undefined index when calculating distance

本文关键字：索引未定义距离计算 | 更新日期: 2023-09-27

我试图根据纬度和经度值获得两个地方之间的距离，但我得到了未定义的索引错误。

    <?php  function GetDrivingDistance($lat1, $lat2, $long1, $long2)
    {
    $distance="";
    $duration="";
    $url = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=".$lat1.",".$long1."&destinations=".$lat2.",".$long2."&mode=driving&language=pl-PL";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_PROXYPORT, 3128);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    $response = curl_exec($ch);
    curl_close($ch);
    $response_a = json_decode($response, true);
    $dist = $response_a['rows'][0]['elements'][0]['distance']['text'];
    $time = $response_a['rows'][0]['elements'][0]['duration']['text'];
    return array('distance' => $dist, 'time' => $time);
}
//echo GetDrivingDistance(17.4999219, 78.47664, 17.4484114, 78.3631118) . " Kilometers<br>";
$dist = GetDrivingDistance(17.4999219, 78.47664, 17.4484114, 78.3631118);
    echo 'Distance: <b>'.$dist['distance'].'</b><br>Travel time duration: <b>'.$dist['time'].'</b>';
?>

根据您的代码，如果我改变lat&长得像这样。

$result = GetDrivingDistance(37.691082,40.520775, -99.807927, -106.971013);
print_r($result);
echo "Distance ".$result['distance'];

使用print_r（）输出第一行；

Array ( [distance] => 913 km [time] => 8 godz. 56 min )

第二行带有回波

913 km

你的问题可能是谷歌无法从你的lat&长

Lat和log在函数输入中出现故障。我添加了一些检查，以确保谷歌的输出有效，这就是为什么你会收到索引通知的原因。我更新了代码，如果从谷歌提取时发生错误，则返回false。

<?php
function GetDrivingDistance($lat1, $long1, $lat2, $long2)
{
    $distance="";
    $duration="";
    $url = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=".$lat1.",".$long1."&destinations=".$lat2.",".$long2."&mode=driving&language=pl-PL";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_PROXYPORT, 3128);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    $response = curl_exec($ch);
    curl_close($ch);
    $response_a = json_decode($response, true);
    // check the results
    if($response_a['status'] != 'OK' ||  $response_a['rows'][0]['elements'][0]['status'] == "NOT_FOUND") {
        return false;
    }
    $dist = $response_a['rows'][0]['elements'][0]['distance']['text'];
    $time = $response_a['rows'][0]['elements'][0]['duration']['text'];
    return array('distance' => $dist, 'time' => $time);
} 
//echo GetDrivingDistance(17.4999219, 78.47664, 17.4484114, 78.3631118) . " Kilometers";
$dist = GetDrivingDistance(17.4999219, 78.47664, 17.4484114, 78.3631118); 
if($dist) {
    echo 'Distance: '.$dist['distance'].'
    Travel time duration: '.$dist['time'].''; 
} else {
    echo "error";
}
?>