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