PHP-从键数组中获取嵌套数组的值 [英] PHP - Getting Value of Nested Array from Array of Keys

问题描述

我有以下内容:

$values = Array (
          ['level1'] => Array (
             ['level2'] => Array(
                 ['level3'] => 'Value'
                 )
              )
          )

我还有一个键数组:

$keys = Array (
          [0] => 'level1',
          [1] => 'level2',
          [2] => 'level3'
        )

我希望能够使用$ keys数组，因此我可以提出:$ values ['level1'] ['level2'] ['level3'].级别和键名称的数量将发生变化，因此我需要一个解决方案，该解决方案将读取$ keys数组，然后遍历$ values直到获得最终值.

I want to be able to use the $keys array so I can come up with: $values['level1']['level2']['level3']. The number of levels and key names will change so I need a solution that will read my $keys array and then loop through $values until I get the end value.

推荐答案

您可以遍历$values并像这样存储$ref:

You could iterate over $values and store a $ref like this :

$ref = $values ;
foreach ($keys as $key) {
    if (isset($ref[$key])) {
        $ref = $ref[$key];
    }
}
echo $ref ; // Value

您还可以使用引用(&)避免复制数组:

You also could use references (&) to avoid copy of arrays :

$ref = &$values ;
foreach ($keys as &$key) {
    if (isset($ref[$key])) {
        $ref = &$ref[$key];
    }
}
echo $ref ;

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