多维数组foreach

Question

我有一个多维数组，如下所示，我想简单地得到[caption]的值，它位于底部的[image_meta]数组中。

Array
(
[file] => 2014/01/dreamstimecomp_5449062.jpg
[sizes] => Array
    (
        [thumbnail] => Array
            (
                [file] => dreamstimecomp_5449062-150x150.jpg
            )

        [medium] => Array
            (
                [file] => dreamstimecomp_5449062-300x224.jpg
            )

    )

[image_meta] => Array
    (
        [aperture] => 0
        [credit] => 
        [camera] => 
        [caption] => 
        [created_timestamp] => 0
        [copyright] => 
        [focal_length] => 0
        [iso] => 0
        [shutter_speed] => 0
        [title] => 
    )

）

我已经为下面的每个循环尝试了这个但是没有工作

echo '<pre>';
print_r($caption_data); 
echo '</pre>';
foreach ($caption_data as $x=>$x_value){
    echo $x[0][3];
}

Answer 1

echo $caption_data['image_meta']['caption']

Answer 2

您不需要循环来获取单个值。你可以这样做：

$value = $array_containing_datastructure['image_meta']['caption'];