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php实现电梯

2026-02-14 15:35:26PHP

PHP实现电梯系统的基本思路

电梯系统的核心是模拟电梯的运行逻辑，包括上下移动、停靠楼层、响应内外请求等。PHP作为服务器端语言，可通过面向对象的方式实现电梯的类模型。

电梯类的基本结构

class Elevator {
    private $currentFloor = 1;  // 当前楼层
    private $direction = 'idle'; // 运行方向: up/down/idle
    private $requests = [];     // 所有请求队列
    private $maxFloor;          // 最高楼层

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

添加请求方法

public function addRequest($floor, $direction) {
    if ($floor > 0 && $floor <= $this->maxFloor) {
        $this->requests[] = [
            'floor' => $floor,
            'direction' => $direction
        ];
        $this->processRequests();
    }
}

请求处理逻辑

private function processRequests() {
    if (empty($this->requests)) {
        $this->direction = 'idle';
        return;
    }

    // 按距离当前楼层的远近排序请求
    usort($this->requests, function($a, $b) {
        return abs($a['floor'] - $this->currentFloor) <=> abs($b['floor'] - $this->currentFloor);
    });

    $nextRequest = $this->requests[0];
    $this->moveToFloor($nextRequest['floor']);
}

移动控制方法

private function moveToFloor($targetFloor) {
    while ($this->currentFloor != $targetFloor) {
        if ($this->currentFloor < $targetFloor) {
            $this->direction = 'up';
            $this->currentFloor++;
        } else {
            $this->direction = 'down';
            $this->currentFloor--;
        }

        $this->checkStop();
        sleep(1); // 模拟移动耗时
    }

    $this->stopAtFloor();
}

到达处理

private function stopAtFloor() {
    $this->direction = 'idle';
    // 移除已完成请求
    $this->requests = array_filter($this->requests, function($req) {
        return $req['floor'] != $this->currentFloor;
    });
}

使用示例

$elevator = new Elevator(10);
$elevator->addRequest(5, 'up');
$elevator->addRequest(3, 'down');

扩展功能建议

增加电梯状态监控方法

php实现电梯

public function getStatus() {
 return [
     'currentFloor' => $this->currentFloor,
     'direction' => $this->direction,
     'pendingRequests' => count($this->requests)
 ];
}

实现多电梯调度系统

class ElevatorSystem {
 private $elevators = [];

 public function addElevator($elevator) {
     $this->elevators[] = $elevator;
 }

 public function dispatchRequest($floor, $direction) {
     // 实现智能分配算法
 }
}