PHP 二维数组合并（二）

例如有如下数组：

$arr = array(
        0=>array(
            ‘product‘=>‘120‘,
            ‘type‘=>0
        ),
        1=>array(
            ‘product‘=>‘120‘,
            ‘type‘=>0
        ),
        2=>array(
            ‘product‘=>‘120‘,
            ‘type‘=>1
        ),
        3=>array(
            ‘product‘=>‘121‘,
            ‘type‘=>0
        ),
        4=>array(
            ‘product‘=>‘121‘,
            ‘type‘=>1
        ),
        5=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>2
        ),
        6=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>3
        ),
        7=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>3
        ),
        8=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>3
        ),
        9=>array(
            ‘product‘=>‘123‘,
            ‘type‘=>2
        ),
);

要求：

① 相同 product 值的数组要合并成一个数组，并计算具有相同 product 的数组的个数；

② 计算相同 product 值的数组的 type，相同的 type 保留一个，并计该 type 相加的数量；不同的 type 也进行保留，数量为1

即将上面的数组转换为下面的数组：

array
  2 =>
    array
      ‘product‘ => string ‘120‘ (length=3)
      ‘count‘ => int 3
      ‘newtype‘ =>
        array
          0 => int 2
          1 => int 1
  4 =>
    array
      ‘product‘ => string ‘121‘ (length=3)
      ‘count‘ => int 2
      ‘newtype‘ =>
        array
          0 => int 1
          1 => int 1
  8 =>
    array
      ‘product‘ => string ‘122‘ (length=3)
      ‘count‘ => int 4
      ‘newtype‘ =>
        array
          2 => int 1
          3 => int 3
  9 =>
    array
      ‘product‘ => string ‘123‘ (length=3)
      ‘count‘ => int 1
      ‘newtype‘ =>
        array
          2 => int 1

php：

<?php

$arr = array(
        0=>array(
            ‘product‘=>‘120‘,
            ‘type‘=>0
        ),
        1=>array(
            ‘product‘=>‘120‘,
            ‘type‘=>0
        ),
        2=>array(
            ‘product‘=>‘120‘,
            ‘type‘=>1
        ),
        3=>array(
            ‘product‘=>‘121‘,
            ‘type‘=>0
        ),
        4=>array(
            ‘product‘=>‘121‘,
            ‘type‘=>1
        ),
        5=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>2
        ),
        6=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>3
        ),
        7=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>3
        ),
        8=>array(
            ‘product‘=>‘122‘,
            ‘type‘=>3
        ),
        9=>array(
            ‘product‘=>‘123‘,
            ‘type‘=>2
        ),
);

var_dump($arr);

//首先对数组排序，例如：order by product asc,type asc
$i = 1;
$j = 1;
$newtype = array();
foreach($arr as $k=>$v){

    if($k < count($arr)-1){

        if($arr[$k][‘product‘] == $arr[$k+1][‘product‘]){

            if($arr[$k][‘type‘] == $arr[$k+1][‘type‘]){
                $j++;
                $newtype[$arr[$k][‘product‘]][$arr[$k+1][‘type‘]] = $j;
            }else{
                $j = 1;
                $newtype[$arr[$k][‘product‘]][$arr[$k+1][‘type‘]] = $j;
            }

            $i++;
            $arr[$k+1][‘count‘] = $i;
            $arr[$k][‘del‘] = 1;
        }else{

            $j = 1;
            $newtype[$arr[$k+1][‘product‘]][$arr[$k+1][‘type‘]] = $j;

            $i = 1;
            $arr[$k+1][‘count‘] = $i;
        }
    }
}

foreach ($arr as $k=>$v) {
    if(@$arr[$k][‘del‘]){
        unset($arr[$k]);
    }
}
echo ‘<hr>‘;
var_dump($arr);
echo ‘<hr>‘;
var_dump($newtype);

foreach($arr as $key=>$val){
    foreach ($newtype as $k => $v) {
        if($arr[$key][‘product‘] == $k){
            $arr[$key][‘newtype‘] = $v;
        }
    }
    unset($arr[$key][‘type‘]);
}

echo ‘<hr>‘;
var_dump($arr);