PHP如何对内部数组的元素进行分组和计数 - PHP how to group and count elements of inner array

PHP how to group and count elements of inner array

本文关键字：元素内部数组 PHP | 更新日期: 2023-09-27

有人能解释一下如何从下面的数组中获得这个结果吗？这是我正在寻找的结果：

Array
(
    [Nov 18, 2011] => Array
        (
            [C] => 2
            [I] => 1
        )
    [Nov 22, 2011] => Array
        (
            [C] => 2
        )
)

这是带有原始数据的数组：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [Nov 18, 2011] => C
                )
            [1] => Array
                (
                    [Nov 18, 2011] => C
                )
            [2] => Array
                (
                    [Nov 18, 2011] => I
                )
        )
    [1] => Array
        (
            [0] => Array
                (
                    [Nov 22, 2011] => C
                )
            [1] => Array
                (
                    [Nov 22, 2011] => C
                )
        )
)

显示的第一个数组表示内部数组中每个元素的项数，这是我试图从下一个数组中总结的内容。谢谢

编辑-

以下是生成上述array:的查询

$qrybilled = $this->db->query("SELECT tbltc.BILLED FROM tbltc WHERE tbltc.PN = $pn AND tbltc.Y = $taxyear AND tbltc.SCENARIO = $scenario GROUP BY BILLED");
$x = 0; $arr_billed = array();
foreach ($qrybilled->result() as $row) {
$qry3 = $this->db->query("SELECT tbltc.* FROM tbltc WHERE tbltc.PN = $pn AND tbltc.Y = $taxyear AND tbltc.SCENARIO = $scenario AND tbltc.BILLED = '".$row->BILLED."' GROUP BY TC ORDER BY CAT ASC, TC ASC");
    $tmp3 = array();
    foreach ($qry3->result() as $row) {     
        $tmp3[] = array( date("M d, Y",strtotime($row->BILLED)) => $row->CAT);
    }
    $arr_billed3[] = $tmp3; 
}
$data['billed3'] = $arr_billed3;

$arr[0][] = array('Nov 18, 2011'=>'C');
$arr[0][] = array('Nov 18, 2011'=>'C');
$arr[0][] = array('Nov 18, 2011'=>'I');
$arr[1][] = array('Nov 22, 2011'=>'C');
$arr[1][] = array('Nov 22, 2011'=>'C');
$result = array();
foreach($arr as $key=>$value){
    foreach($value as $k=>$v){
        foreach($v as $_k=>$_v){
            if(isset($result[$_k][$_v])){
                $result[$_k][$_v]++;
            }
            else {
                $result[$_k][$_v] =1;
            }
        }
    }
}

阵列结果：

print_r($result);
Array
(
    [Nov 18, 2011] => Array
        (
            [C] => 2
            [I] => 1
        )
    [Nov 22, 2011] => Array
        (
            [C] => 2
        )
)

$food = array('0' => array('orange', 'banana', 'apple','jack'),
              '1' => array('carrot', 'collard', 'pea'));
echo count($food); // output 2
echo count($food[0]) // output 4
echo count($food[1]) // output 3