Question

我有一个从db返回的数组：

[0] array(2) {
  ["Brand"] "A"
  ["Family"] "B"
}
[1] array(2) {
  ["Brand"] "A"
  ["Family"] "C"
}
[2] array(2) {
  ["Brand"] "A"
  ["Family"] "D"
}
[3] array(2) {
  ["Brand"] "B"
  ["Family"] "ABC"
}
[4] array(2) {
  ["Brand"] "B"
  ["Family"] "DD"
}

我需要像这样创建一个数组：

[0] array(2) {
  ["Brand"] "A" array() {
    "B",
    "C",
    "D"
}
[1] array(2) {
  ["Brand"] "B" array() {
    "ABC",
    "DD"
}

所以基本上，品牌应该是独一无二的，在每个品牌中我需要一个家庭列表。

Answer 1

尝试以下操作，$mainarray是您现在拥有的数组

$brand = array();
foreach($mainarray as $v){
    $brand['Brand'][$v['Brand']][] = $v['Family'];
}

Answer 2

这是一个简单的数组递归练习。

这里有一些PHP伪代码：

$output = array();

foreach($array as $i){
//loop through the array returned from the db

$output[$i["brand"]] = array_unique(array_merge($output[$i["brand"]], array($i["Family"])));
//merge the existing families for the brand with the current iteration's, and maintain a set datastructure (no duplicate entries for each family)
}

var_dump($output);

Answer 3

这是你所需要的：

<?php

$array1=array(array('Brand'=>'A','Family'=>'B'), array('Brand'=>'A','Family'=>'C'), array('Brand'=>'A','Family'=>'D'), array('Brand'=>'B','Family'=>'ABC'), array('Brand'=>'B','Family'=>'DD'));


$brand=array();

        foreach($array1 as $value=>$data){
            foreach($data as $value2=>$data2){
                if($value2=='Family'):
                    if($value<3):
                    $brand['Brand']['A'][]=$data2;
                    else:
                    $brand['Brand']['B'][]=$data2;
                    endif;
                endif;
            }
        }

echo "<pre>";
print_r($brand);
echo "</pre>";  

?>

用db数据构造php数组

3 个答案: