Question

我在多维数组中获取值时遇到问题

Array
(
    [0] => Array
        (
            [name] => Brandow & Johnston, Inc.
            [lat] => 34.051405
            [lng] => -118.255576
        )

    [1] => Array
        (
            [name] => Industry Metrolink Train Station
            [lat] => 34.00848564346
            [lng] => -117.84509444967
        )

    [2] => Array
        (
            [name] => The Back Abbey
            [lat] => 34.095161
            [lng] => -117.720638
        )

    [3] => Array
        (
            [name] => Eureka! Burger Claremont
            [lat] => 34.094572563643
            [lng] => -117.72184828904
        )

)

假设我上面有一个阵列

我正在使用foreach循环，如下面的

foreach($_SESSION['array'] as $value){

    foreach($valueas $key_location=> $value_location){

        if($key_location = "name"){$fsq_name = $value_location;}
        $fsq_lat = $value_location["lat"];
        $fsq_lng = $value_location["lng"];



        echo "<i>".$fsq_lat."</i><br/>";

        }

    }

我尝试过使用if语句，或使用$value_location["lat"];，但它没有生成正确的值。

如果我使用if($key_location === "lng"){$fsq_lng = $value_location;}符号进行three equal，则会在几次迭代时给出错误，然后生成lng结果。如果我只是one equal签名并回复它，它也会给我name密钥。

我错过了什么吗？

由于

Answer 1

您实际上并不需要内部foreach循环。外部就足够了，因为它遍历数组。内部数组可以通过外部foreach内的键访问。

foreach($_SESSION['array'] as $value){
  $fsq_name = $value["name"];
  $fsq_lat = $value["lat"];
  $fsq_lng = $value["lng"];

  echo "<i>".$fsq_lat."</i><br/>";

  // Actually none of the above assignments are necessary
  // you can just:
  echo "<i>".$value["lat"]."</i><br/>";
}

Answer 2

也许重构一下？

foreach($_SESSION['array'] as $value)
{
    // pull the lat and lng values from the value
    $fsq_lat = $value["lat"];
    $fsq_lng = $value["lng"];
    $fsq_name = $value["name"];

echo "<i>".$fsq_lat."</i><br/>";


}// foreach

php foreach循环多维数组有问题

2 个答案: