PHP多维数组差集、排序

1.差集

if($query){
        foreach ($query as $value){

            $res[$value->day][]=$value->getAttributes(['period']);
        }
    }

var_dump($res);
die;

$res=array(‘2017-07-14’=>[[‘period’=>’11:00-11:30’],[‘period’=>’11:30-12:00’],[‘period’=>’12:00-12:30’],
[‘period’=>’12:30-13:00’],[‘period’=>’13:00-13:30’],[‘period’=>’13:30-14:00’]],
‘2017-07-15’=>[[‘period’=>’11:00-11:30’],[‘period’=>’11:30-12:00’],[‘period’=>’12:00-12:30’],
[‘period’=>’12:30-13:00’],[‘period’=>’13:00-13:30’],[‘period’=>’13:30-14:00’]],
‘2017-07-16’=>[[‘period’=>’11:00-11:30’],[‘period’=>’11:30-12:00’],[‘period’=>’12:00-12:30’],
[‘period’=>’12:30-13:00’],[‘period’=>’13:00-13:30’],[‘period’=>’13:30-14:00’]],
);

---

       //求出今天已经过时的时间段
    $now = date('H:i');
    $expire = array();
    if (isset($res[$today])) {
        foreach ($res[$today] as $periods) {
            $period = $periods['period'];
            $start_time = substr($period, 0, 5);

            if ($now > $start_time) {
                $expire[] = $periods;
            }
        }
    }


//二维数组差集
    $c = array();
    foreach ($res[$today] as $record) {
        if (!in_array($record, $expire)) {
            $c[] = $record;
        }
    }

    if ($c) {
        $res[$today] = $c;
    } else {
        unset($res[$today]);
    }

    $data = array();
    if ($res) {
        foreach ($res as $key => $items) {
            $ret['day'] = $key;
            foreach ($items as $item) {
                $ret['periods'][] = $item['period'];
            }

            $data[] = $ret;
            unset($ret);

        }
    }

“data”: [
{
“day”: “2017-07-14”,
“periods”: [
“13:30-14:00”
]
},
{
“day”: “2017-07-15”,
“periods”: [
“11:00-11:30”,
“11:30-12:00”,
“12:00-12:30”,
“12:30-13:00”,
“13:00-13:30”,
“13:30-14:00”
]
},
{
“day”: “2017-07-16”,
“periods”: [
“11:00-11:30”,
“11:30-12:00”,
“12:00-12:30”,
“12:30-13:00”,
“13:00-13:30”,
“13:30-14:00”
]
},

---

2.差集

$arr1 = array(
array('appid'=>'1111','sku'=>'aaaa'),
array('appid'=>'222','sku'=>'bbbb'),
array('appid'=>'333','sku'=>'cccc'),
array('appid'=>'444','sku'=>'ddd')
);
$arr2 = array(
array('appid'=>'1111','sku'=>'aaaa'),
array('appid'=>'222','sku'=>'bbbb'),
array('appid'=>'555','sku'=>'ee')
);
//方法一，用闭包
$r = array_filter($arr1, function($v) use ($arr2) { return ! in_array($v, $arr2);});
print_r($r);
//方法二
foreach($arr1 as $k=>$v) if(in_array($v, $arr2)) unset($arr1[$k]);
print_r($arr1);

Array
(
[2] => Array
(
[appid] => 333
[sku] => cccc
)

[3] => Array
(
[appid] => 444
[sku] => ddd
)
)

---

3.多维素组差集

<?php
//多维数组的差集
function array_diff_assoc_recursive($array1,$array2){
    $diffarray=array();
    foreach ($array1 as $key=>$value){
        //判断数组每个元素是否是数组
        if(is_array($value)){
            //判断第二个数组是否存在key
            if(!isset($array2[$key])){
                $diffarray[$key]=$value;
                //判断第二个数组key是否是一个数组
            }elseif(!is_array($array2[$key])){
                $diffarray[$key]=$value;
            }else{
                $diff=array_diff_assoc_recursive($value, $array2[$key]);
                if($diff!=false){
                    $diffarray[$key]=$diff;
                }
            }
        }elseif(!array_key_exists($key, $array2) || $value!==$array2[$key]){
            $diffarray[$key]=$value;
        }
    }
    return $diffarray;
}
$array1=array(1,2,3,array(1,2,array(1)));
$array2=array(1,2,4,array(1,2,3));
print_r(array_diff_assoc_recursive($array1,$array2)); 

Array ( [2] => 3 [3] => Array ( [2] => Array ( [0] => 1 ) ) )

---

4.多维数组排序

//list数组将根据分数排序
foreach ($list as $key => $row) {
        $volume[$key] = $row['score'];
    }

    array_multisort($volume, SORT_DESC, $list);

---

<?php
$data[] = array('volume' => 67, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 1);
$data[] = array('volume' => 85, 'edition' => 6);
$data[] = array('volume' => 98, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 6);
$data[] = array('volume' => 67, 'edition' => 7);
?> 

<?php
// 取得列的列表
foreach ($data as $key => $row) {
    $volume[$key]  = $row['volume'];
    $edition[$key] = $row['edition'];
}

// 将数据根据 volume 降序排列，根据 edition 升序排列
// 把 $data 作为最后一个参数，以通用键排序
array_multisort($volume, SORT_DESC, $edition, SORT_ASC, $data);
?> 

volume | edition
—+—–
98 | 2
86 | 1
86 | 6
85 | 6
67 | 2
67 | 7