class Person implements ArrayAccess
{
    public function offsetExists($offset)
    {
        return isset($this->$offset);
    }

    public function offsetGet($offset)
    {
        return $this->$offset;
    }

    public function offsetSet($offset, $value)
    {
        $this->$offset = $value;
    }

    public function offsetUnset($offset)
    {
        unset($this->$offset);
    }
}

$person = new Person();
$person->name = "hello";
echo $person['name']; //hello
var_dump((array)$person);//array(1) { 'name' =>  string(2) "cy"}
var_dump(isset($person));//bool(true)
unset($person['name']);
var_dump(isset($person));//bool(false)

server {
    server_name example.com;
    listen 80;
    return 307 https://$host$request_uri;
}

server {
    server_name example.com;
    listen 443 ssl;
}

server {
    server_name example.com;
    listen 80;
    listen 443 ssl;

    error_page 497 https://$host$request_uri;  
}

if ($scheme != "https") {
    rewrite ^ https://$host$request_uri permanent;
}

$ sudo -l
Matching Defaults entries for root on this host:
    !visiblepw, always_set_home, env_reset, env_keep="COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR LS_COLORS",
    env_keep+="MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE", env_keep+="LC_COLLATE LC_IDENTIFICATION
    LC_MEASUREMENT LC_MESSAGES", env_keep+="LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE", env_keep+="LC_TIME
    LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY", secure_path=/sbin\:/bin\:/usr/sbin\:/usr/bin

xdebug.profiler_enable=on
xdebug.trace_output_dir="D:\webserver\xdebug"
xdebug.profiler_output_dir="D:\webserver\xdebug"

<?php
class Request
{
    /**
     * @var string
     */
    public $requester;
    /**
     * @var int
     */
    public $dayCount;
    /**
     * @var string
     */
    public $reason;

    /**
     * Request constructor.
     * @param $requester string
     * @param $dayCount int
     * @param $reason string
     */
    public function __construct($requester, $dayCount, $reason)
    {
        $this->requester = $requester;
        $this->dayCount = $dayCount;
        $this->reason = $reason;
    }
}

interface Manager
{
    /**
     * @param Request $request
     * @return mixed
     */
    public function handle(Request $request);
}


class DepartmentManager implements Manager
{
    /**
     * @var Manager
     */
    private $supervisor;
    /**
     * @var string
     */
    private $name;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function handle(Request $request)
    {
        if ($request->dayCount > 3) {
            $this->supervisor->handle($request);
        } else {
            echo $this->name . "批准了" . $request->requester . "的请假, 共" . $request->dayCount . "天";
            echo "\r\n原因是:" . $request->reason;
        }
    }

    public function setSupervisor(Manager $manager)
    {
        $this->supervisor = $manager;
    }
}

class CompanyManager implements Manager
{
    /**
     * @var Manager
     */
    private $supervisor;
    /**
     * @var string
     */
    private $name;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function handle(Request $request)
    {
        if ($request->dayCount > 7) {
            $this->supervisor->handle($request);
        } else {
            echo $this->name . "批准了" . $request->requester . "的请假, 共" . $request->dayCount . "天";
            echo "\r\n原因是:" . $request->reason;
        }
    }

    public function setSupervisor(Manager $manager)
    {
        $this->supervisor = $manager;
    }
}

class SuperManager implements Manager
{
    /**
     * @var Manager
     */
    private $supervisor;
    /**
     * @var string
     */
    private $name;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function handle(Request $request)
    {
        echo $this->name . "批准了" . $request->requester . "的请假, 共" . $request->dayCount . "天";
        echo "\r\n原因是:" . $request->reason;
    }

    public function setSupervisor(Manager $manager)
    {
        $this->supervisor = $manager;
    }
}

$departmentManager = new DepartmentManager("部门领导");
$companyManager = new CompanyManager("公司领导");
$superManager = new SuperManager("董事长");
$departmentManager->setSupervisor($companyManager);
$companyManager->setSupervisor($superManager);

$request = new Request("小明", 3, "我想回家回家回家");
$departmentManager->handle($request);

$ curl -F 'data=@path/to/local/file’ UPLOAD_ADDRES

$ curl -F 'img_avatar=@/home/petehouston/hello.txt' http://localhost/upload

$ curl -F 'fileX=@/path/to/fileX' -F 'fileY=@/path/to/fileY' ... http://localhost/upload

$ curl -F 'files[]=@/path/to/fileX' -F 'files[]=@/path/to/fileY' ... http://localhost/upload

//javascript
function getIDCard(str){
    let modulus = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
    let mods = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2', '1']
    if(str.length == 15){
        str = str.substr(0,6) + "19" + str.substr(6, str.length - 6)
    }
    let total = 0
    modulus.forEach(function(value, index){
        total += value * str[index]
    })
    return str + mods[total % 11]
}

func getIDCard(str string) string {
    modulus := []int{7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2}
    mods := []rune{'1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2', '1'}
    if len(str) == 15 {
        str = str[:6] + "19" + str[6:]
    }
    total := 0
    for i, v := range modulus {
        strHere, _ := strconv.Atoi(string(str[i]))
        total += v * strHere
    }

    return str + string(mods[total%11])
}

func quickSort(arr []int) []int {
    if len(arr) <= 1 {
        return arr
    }
    //首次拆分
    left, selectValue, right := split(arr)
    list := [][]int{left, selectValue, right}
    for i := 0; i < len(list); i++ {
        v := list[i]
        if len(v) <= 1 {
            continue
        }
        A, B, C := split(v)
        temp := make([][]int, len(list[i+1:]))
        copy(temp, list[i+1:])
        //替换长度大于1的
        list = append(append(list[:i], A, B, C), temp...)
        i--
    }
    var result []int
    for _, v := range list {
        if len(v) > 0 {
            result = append(result, v[0])
        }
    }
    return result
}

func split(arr []int) ([]int, []int, []int) {
    selectIndex := len(arr) / 2
    var left, right []int
    for i, v := range arr {
        if selectIndex == i {
            continue
        }
        if v <= arr[selectIndex] {
            left = append(left, v)
            continue
        }
        right = append(right, v)
    }
    return left, []int{arr[selectIndex]}, right
}