Question

我想动态访问多维数组，因为我需要在配置文件中显示完整路径。以下是我知道您可以在某个级别访问该值的几个示例。

echo $results['Data']['MetaAttrListId']['0'];

$string = "MetaAttrListId";
echo $results['Data'][$string]['0'];

但我想要做的是在字符串中提供该区域的完整位置/路径。像这样。

$string = "['Data']['MetaAttrListId']['0']";
echo $results[$string];

访问多维数组的输出。

    (
        [Data] => Array
            (
                [MetaTitle] => Array
                    (
                        [0] => Vauxhall combo 1.3 cdti in stunning condition low mileage long mot till august
                    )

                [MetaAttrListId] => Array
                    (
                        [0] => Posted
                        [1] => Make
                        [2] => Model
                        [3] => Year
                        [4] => Mileage
                        [5] => Seller type
                        [6] => Body type
                        [7] => Fuel type
                        [8] => Transmission
                        [9] => Colour
                        [10] => Engine size
                    )

                [MetaAttrListValue] => Array
                    (
                        [0] => 1 day ago
                        [1] => Vauxhall
                        [2] => COMBO
                        [3] => 2005
                        [4] => 79000
                        [5] => Private
                        [6] => Car Derived Van
                        [7] => Diesel
                        [8] => Manual
                        [9] => Red
                        [10] => 1248
                    )

            )

        [Error] => 
    )

Answer 1

你可能会尝试我前几天建立的这个功能（也受到我现在不能找到的另一个stackoverflow线程的启发，但也有类似的问题）

像value_in($arrayThingy, 'path.to.that.entry')或value_in($arrayThingy, 'path/to/that/entry', '/')

一样使用它

希望它有所帮助，如果你找到一个，请报告任何失败：）

/**
 * value_in
 * 
 * @param  mixed    $haystack   array or object or nested mix of both
 * @param  string   $path       path in any token-separated notation
 * @param  string   $token      path separator token
 * @return mixed                resolved value
 */
function value_in($haystack, $path, $token = ".") {
    $path = trim($path, $token); // path.to.place
    $segments = explode($token, $path); // ["path", "to", "place"]
    $remains = $haystack;
    foreach ($segments as $segment) {

        if (gettype($remains) === 'array' && isset($remains[$segment])) {
            $remains = $remains[$segment];
        } else if (gettype($remains) === 'object' && isset($remains->$segment)) {
            $remains = $remains->$segment;

        } else {
            return null;
        }
    }
    return $remains;
}

如何动态访问多维数组中的值

1 个答案: