如何使用 PHP 将 JSON 节点转换为数组

Question

I have to filter portions of a JSON, there are different nodes/sub-nodes and I really need only a portion, for example this is what it may look like:

"node1":{         
    "686":{            
        "value1":"686",
        "value2":"M",
        "value3":0
    }
    "687":{            
        "value1":"687",
        "value2":"L",
        "value3":1
    }
    "688":{            
        "value1":"688",
        "value2":"M",
        "value3":0
    }

For example I need to extract the node1 nodes, specifically ["686","687","688"] what I have tried so far:

$node1values = array_keys((array)$myjson->node1)

The response is weird: * items consider that I never use PHP regularly, no idea how to get this sorted without having to write a procedure to iterate every possible node.

Answer 1

Use array_column() to get a particular property from each array element.

$node1values = array_column((array)$myjson->node1, 'value1');

DEMO