合并三个不同长度的多维数组

Question

我在将 3 个不同长度且没有重复键的多维数组合并到一个数组时遇到了一点问题，如下所示：

我的 3 个数组：

$volume380 = array {
array {
    "DATE" => "2018-07-30"
    "VOLUME380" => 813.0
}
    array {
    "DATE" => "2018-07-31"
    "VOLUME380" => 1188.0
}

    array {
    "DATE" => "2018-08-01"
    "VOLUME380" => 1081.0
}

    array {
    "DATE" => "2018-08-02"
    "VOLUME380" => 886.0
}
}

$volume320 = array {
array {
    "DATE" => "2018-07-30"
    "VOLUME320" => 813.0
}
    array {
    "DATE" => "2018-07-31"
    "VOLUME320" => 1188.0
}

    array {
    "DATE" => "2018-08-02"
    "VOLUME320" => 1081.0
}
}

$volume800 = array {
array {
    "DATE" => "2018-07-30"
    "VOLUME800" => 813.0
}
    array {
    "DATE" => "2018-07-31"
    "VOLUME800" => 1188.0
}

    array {
    "DATE" => "2018-08-01"
    "VOLUME800" => 1081.0
}

    array {
    "DATE" => "2018-08-02"
    "VOLUME800" => 886.0
}
}

我想要的结果：

$volumeTot = array {
array {
    "DATE" => "2018-07-30"
    "VOLUME380" => 813.0
    "VOLUME320" => 813.0
    "VOLUME800" => 813.0
}
    array {
    "DATE" => "2018-07-31"
    "VOLUME380" => 1188.0
    "VOLUME320" => 1188.0
    "VOLUME800" => 1188.0
}

    array {
    "DATE" => "2018-08-01"
    "VOLUME380" => 1081.0
    "VOLUME800" => 1081.0
}

    array {
    "DATE" => "2018-08-02"
    "VOLUME380" => 886.0
    "VOLUME320" => 1081.0
    "VOLUME800" => 886.0
}
}

我尝试了不同的方法来解决这个问题，但由于数组的长度不同，我有点坚持。

我尝试过使用 for 循环和数组合并，但它没有达到我想要的效果。

感谢您的帮助。

Answer 1

从查看您的数据来看，“日期”似乎本身就是“关键”。考虑到这种逻辑，函数“array_indexer”将现有数据点（例如 $volume380）转换为使用“DATE”作为数组键的索引数组。创建第二个函数“array_deindexer”以将数组格式恢复为原始数据出现的格式。

合并发生在“array_combiner”函数内部，该函数“索引”给定的新数组和累积的数组，然后合并公共键（如“DATE”值）。

完整代码如下：

$volume380 = array (
    array (
        "DATE" => "2018-07-30",
        "VOLUME380" => 813.0
    ),
        array (
        "DATE" => "2018-07-31",
        "VOLUME380" => 1188.0
    ),
    array (
        "DATE" => "2018-08-01",
        "VOLUME380" => 1081.0
    ),
    array (
        "DATE" => "2018-08-02",
        "VOLUME380" => 886.0
    )
);

$array_final = array_combiner($volume380);

$volume320 = array (
    array (
        "DATE" => "2018-07-30",
        "VOLUME320" => 813.0
    ),
        array (
        "DATE" => "2018-07-31",
        "VOLUME320" => 1188.0
    ),
    array (
        "DATE" => "2018-08-02",
        "VOLUME320" => 1081.0
    )
);

$array_final = array_combiner($volume320);

$volume800 = array (
    array (
        "DATE" => "2018-07-30",
        "VOLUME800" => 813.0
    ),
    array (
        "DATE" => "2018-07-31",
        "VOLUME800" => 1188.0
    ),
    array (
        "DATE" => "2018-08-01",
        "VOLUME800" => 1081.0
    ),
    array (
        "DATE" => "2018-08-02",
        "VOLUME800" => 886.0
    )
);

$array_final = array_combiner($volume800);

print_r($array_final);

function array_combiner($array_tmp) {
    global $array_final;
    $array_tmp = array_indexer($array_tmp);
    $tmp = array();
    if (count($array_final) > 0)  {
        $tmp = array_indexer($array_final);
        foreach ($array_tmp as $k1 => $v1) {
            if (!isset($tmp[$k1])) $tmp[$k1] = array();
            foreach ($v1 as $k2 => $v2) {
                $tmp[$k1][$k2] = $v2;
            }
        }
    } else $tmp = $array_tmp;
    return array_deindexer($tmp);
}

function array_indexer($array_tmp) {
    $tmp = array();
    foreach ($array_tmp as $k1 => $v1) {
        $index = "";
        $data = array();
        foreach ($v1 as $k2 => $v2) {
            if ($k2 == "DATE") $index = $v2;
            else $data[$k2] = $v2;
        }
        if (strlen($index) > 0) $tmp[$index] = $data;
    }
    return $tmp;
}

function array_deindexer($array_tmp) {
    $tmp = array();
    $i = 0;
    foreach ($array_tmp as $k1 => $v1) {
        $tmp[$i]["DATE"] = $k1;
        foreach ($v1 as $k2 => $v2) $tmp[$i][$k2] = $v2;
        $i++;
    }
    return $tmp;
}