用php中的时隙检查时间的可用性

<?php
class TimeSlotChecker {
    private $slots;
    private $startTime;
    private $slotDuration;

    public function __construct($startTime, $slotDuration, $totalDuration) {
        $this->startTime = $startTime;
        $this->slotDuration = $slotDuration;
        $this->slots = array_fill(0, $totalDuration / $slotDuration, false);
    }

    public function bookSlot($startTime, $duration) {
        $startSlot = intval(($startTime - $this->startTime) / $this->slotDuration);
        $endSlot = intval(($startTime + $duration - $this->startTime) / $this->slotDuration);

        if ($startSlot < 0 || $endSlot >= count($this->slots)) {
            return false; // Out of bounds
        }

        for ($i = $startSlot; $i <= $endSlot; $i++) {
            if ($this->slots[$i]) {
                return false; // Slot already booked
            }
        }

        for ($i = $startSlot; $i <= $endSlot; $i++) {
            $this->slots[$i] = true;
        }

        return true;
    }

    public function isSlotAvailable($startTime, $duration) {
        $startSlot = intval(($startTime - $this->startTime) / $this->slotDuration);
        $endSlot = intval(($startTime + $duration - $this->startTime) / $this->slotDuration);

        if ($startSlot < 0 || $endSlot >= count($this->slots)) {
            return false; // Out of bounds
        }

        for ($i = $startSlot; $i <= $endSlot; $i++) {
            if ($this->slots[$i]) {
                return false; // Slot already booked
            }
        }

        return true;
    }
}

// 示例使用
$checker = new TimeSlotChecker(strtotime('2023-10-01 09:00:00'), 300, 7200); // 每5分钟一个时隙，总时长2小时

$startTime = strtotime('2023-10-01 09:15:00');
$duration = 1800; // 30分钟

if ($checker->isSlotAvailable($startTime, $duration)) {
    echo "时间段可用";
} else {
    echo "时间段已被占用";
}
?>