PHP 多维数组转换一维数组

namespace app\libs\utils;class ArrayHelper{    public static function re_array($array, $p_node_deepth=0, $sub_node_deepth=0)    {        $out = array();        foreach($array as $k=>$v){            if(is_array($v)){                $tmp = array("key"=>$k, "value"=>"--","deepth"=>$p_node_deepth);                $out[] = $tmp;                //数组的话，级联调用                $out = array_merge($out, self::re_array($v, $sub_node_deepth+1, $p_node_deepth+1));            }else{                $tmp = array("key"=>$k, "value"=>$v,"deepth"=>$sub_node_deepth);                $out[] = $tmp;            }        }        return $out;    }}

$a = array(    "code"=>0,    "detail"=>array("msg"=>"get data success"),    "func"=>"api");print_r(ArrayHelper::re_array($a));

Array([0] => Array    (        [key] => code        [value] => 0        [deepth] => 0    )[1] => Array    (        [key] => detail        [value] => --        [deepth] => 0    )[2] => Array    (        [key] => msg        [value] => get data success        [deepth] => 1    )[3] => Array    (        [key] => func        [value] => api        [deepth] => 0    ))