从多维数组中返回一个值

时间:2015-06-20 13:46:49

标签: php arrays multidimensional-array

假设我有这个数组(真正的数组确实更大):

Array
(
    [CD000000001] => Array
        (
            [0] => Array
                (
                    [periodo] => 10/2010
                    [incasso] => 15000.00
                    [spesa] => 0.00
                )

            [1] => Array
                (
                    [periodo] => 03/2013
                    [incasso] => 0.00
                    [spesa] => 280.00
                )

        )

    [CD000000002] => Array
        (
            [0] => Array
                (
                    [periodo] => 11/2010
                    [incasso] => 327199.83
                    [spesa] => 0.00
                )

            [1] => Array
                (
                    [periodo] => 03/2013
                    [incasso] => 0.00
                    [spesa] => 3194.90
                )

        )
)

我试图获得匹配第一级数组的[incasso]和[spesa]以及第二级匹配[periodo]的值。所以例如我寻找CD000000002,如果我找到它,那么我寻找03/2013。如果我发现它,我想返回[incasso]和[spesa]值。 CD000000002和[periodo]都是从for循环构建的,因此我将测试现有值和非现有值。 实际上在我看来,我无法正确访问第二个阵列,我不明白为什么。这是我的实际代码: (示例中的$ credito是CD000000002):

    if(isset($flussi[$credito])){
    //if I find CD000000002
        $key = array_search($periodo,$flussi[$credito]);
    //return the key of the second level array that have the value 03/2013
        if($key){
           $incasso = $flussi[$credito][$key]['incasso'];
        }else{
           $incasso = 0.00;
    //return the value of [incasso] corresponding to that key
    }else{
        $incasso = '0.00';
    }
    unset($key);

我做错了什么??? 我不想使用foreach循环,但我想搜索正确寻址数组索引的确切值。复制问题中提到的功能对我来说是众所周知的,但在这种情况下不适用于性能。数组大小太大,无法在每次运行脚本时至少执行5.000次

1 个答案:

答案 0 :(得分:3)

为了$key = array_search($periodo,$flussi[$credito]);找到periodo的值,您需要从数字键更改数组

Array
(
    [CD000000001] => Array
        (
            [0] => Array
                (
                    [periodo] => 10/2010
                    [incasso] => 15000.00
                    [spesa] => 0.00
                )

            [1] => Array
                (
                    [periodo] => 03/2013
                    [incasso] => 0.00
                    [spesa] => 280.00
                )

        )
...

periodo值为键的数组

Array
(
    [CD000000001] => Array
        (
            [10/2010] => Array
                (
                    [periodo] => 10/2010
                    [incasso] => 15000.00
                    [spesa] => 0.00
                )

            [03/2013] => Array
                (
                    [periodo] => 03/2013
                    [incasso] => 0.00
                    [spesa] => 280.00
                )

        )
...