php - 一个算法问题，求大神指点思路

Question

如上图，有一个房间，进入房间时间是一条记录，出去时间是一条记录，每个用户的记录都是不同的，怎么把用户在房间时间段的弄成下面这种数组形式，数据库存储的记录是这样的
['id'=>1,'uid'=>22,'stauts'=>'离开','time'=>1415947332]
['id'=>2,'uid'=>22,'stauts'=>'进入','time'=>1415947333]
['id'=>3,'uid'=>22,'stauts'=>'离开','time'=>1415997332]
['id'=>4,'uid'=>22,'stauts'=>'进入','time'=>1416947333]
['id'=>6,'uid'=>23,'stauts'=>'离开','time'=>1415947332]
['id'=>7,'uid'=>23,'stauts'=>'进入','time'=>1415947333]
['id'=>8,'uid'=>23,'stauts'=>'离开','time'=>1415997332]
['id'=>9,'uid'=>23,'stauts'=>'进入','time'=>1416947333]
...

$data=[
    [0]=>[
        'begin_time'=>第一个进入时间,
        'end_time'=>第一个出去时间,
    ],
    [1]=>[
        'begin_time'=>第二个进入时间,
        'end_time'=>第二个出去时间,
    ],
    [2]=>[
        'begin_time'=>第三个进入时间,
        'end_time'=>第三个进出去时间,
    ],
    [3]=>[
        'begin_time'=>第四个进入时间,
        'end_time'=>第四个进出去时间,
    ]

.....

]

Answer 1

<?php
$data = [];
$status = ['离开'=>'end_time','进入'=>'begin_time'];
$results = [
['id'=>1,'uid'=>22,'status'=>'离开','time'=>1415947332],
['id'=>2,'uid'=>22,'status'=>'进入','time'=>1415947333],
['id'=>3,'uid'=>22,'status'=>'离开','time'=>1415997332],
['id'=>4,'uid'=>22,'status'=>'进入','time'=>1416947333],
['id'=>6,'uid'=>23,'status'=>'离开','time'=>1415947332],
['id'=>7,'uid'=>23,'status'=>'进入','time'=>1415947333],
['id'=>8,'uid'=>23,'status'=>'离开','time'=>1415997332],
['id'=>9,'uid'=>23,'status'=>'进入','time'=>1416947333],
];
foreach($results as $result){
    if(!isset($data[$result['uid']])){
        $data[$result['uid']]=[];
    }
    $data[$result['uid']] += [$status[$result['status']]=>$result['time']];
}
print_r($data);
$data = array_values($data);
print_r($data);

Answer 2

可以循环数组,新数组以id为key保存离开和进入时间，最后再把新数组去掉key就可以得到你要的格式了。 但这样需要查询出来所有的数据

<?php
$data = ['id'=>1,'stauts'=>'离开','time'=>1415947332],['id'=>1,'stauts'=>'进入','time'=>1415947333];    //源数据
$result = array();
foreach($data as $tmp){
    isset($result[$tmp['id']]) or $result[$tmp['id']] = array();
    switch($tmp['status']){
        case '进入' : 
            $result[$tmp['id']]['begin_time'] = $tmp['time'];
            break;
         case '离开' : 
            $result[$tmp['id']]['end_time'] = $tmp['time'];
            break;
    }
}
print_r($result);

Answer 3

<?php
$results = [
['id'=>1,'uid'=>22,'status'=>'离开','time'=>1415947332],
['id'=>2,'uid'=>22,'status'=>'进入','time'=>1415947333],
['id'=>3,'uid'=>22,'status'=>'离开','time'=>1415997332],
['id'=>4,'uid'=>22,'status'=>'进入','time'=>1416947333],
['id'=>6,'uid'=>23,'status'=>'离开','time'=>1415947332],
['id'=>7,'uid'=>23,'status'=>'进入','time'=>1415947333],
['id'=>8,'uid'=>23,'status'=>'离开','time'=>1415997332],
['id'=>9,'uid'=>23,'status'=>'进入','time'=>1416947333],
];
$data=array();
array_sort($results,'time','asc');
foreach($results as $res){
    if($res['status']=='进入'){
        foreach($results as $res1){
            if($res1['status']=='离开' && $res['time']<$res1['time']){
                    $data[]=array('begin_time'=>$res['time'],
                    'end_time'=>$res1['time'],);
                       break;
            }
        }
    }
}
var_dump($data);

大体思路应该是这样，这个多次循环比较耗时，数据多的时候会很慢，有更优化的方法，例如第二层循环的进入先删掉，和某列匹配掉后，unset掉，当然，这要建立在第二层循环的数组和第一层的数组分离开