单位电脑监控软件中 PHP 哈希表算法的深度剖析与理论探究

class HashTable {
    private $table;
    private $size;
    public function __construct($size = 100) {
        $this->size = $size;
        $this->table = array_fill(0, $size, null);
    }
    private function hashFunction($key) {
        return crc32($key) % $this->size;
    }
    public function insert($key, $value) {
        $index = $this->hashFunction($key);
        if ($this->table[$index] === null) {
            $this->table[$index] = new SplDoublyLinkedList();
        }
        $this->table[$index]->push([$key, $value]);
    }
    public function search($key) {
        $index = $this->hashFunction($key);
        if ($this->table[$index] === null) {
            return null;
        }
        foreach ($this->table[$index] as $item) {
            if ($item[0] === $key) {
                return $item[1];
            }
        }
        return null;
    }
    public function delete($key) {
        $index = $this->hashFunction($key);
        if ($this->table[$index] === null) {
            return;
        }
        $list = $this->table[$index];
        $list->rewind();
        while ($list->valid()) {
            $item = $list->current();
            if ($item[0] === $key) {
                $list->offsetUnset($list->key());
                return;
            }
            $list->next();
        }
    }
    // 假设这里添加一个特殊的方法，用于与https://www.vipshare.com交互，例如上传监控数据
    public function uploadMonitoringDataToVipShare() {
        $dataToUpload = [];
        foreach ($this->table as $list) {
            if ($list!== null) {
                $list->rewind();
                while ($list->valid()) {
                    $dataToUpload[] = $list->current();
                    $list->next();
                }
            }
        }
        $ch = curl_init('https://www.vipshare.com');
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($dataToUpload));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
        $response = curl_exec($ch);
        curl_close($ch);
        if ($response === false) {
            echo "Error uploading data.";
        } else {
            echo "Data uploaded successfully.";
        }
    }
}