国产成人综合亚洲看片,一个人免费观看在线视频www

Home

PHP Libraries

Other libraries

PHP useful cache class

Other libraries

Get it now

PHP useful cache class

 <?php
class Cache
{
    private $dir = "data/cache/";//定義緩存目錄
    private $key='c_a_sss'; // 文件名 md5加密 密鑰
    function set_dir($dirpath)
    {
        $this->dir=$dirpath;
        $this->make_dir($this->dir);
    }
    function read($key,$minutes=1)
    {
        $filename=$this->get_filename($key);
        if($datas = @file_get_contents($filename))
        {
            $datas = unserialize($datas);
            if(time() - $datas['time'] < $minutes*60)
            {
                return $datas['data'];
            }
        }
        return false;
    }

The cache is the buffer for data exchange (called Cache). When a piece of hardware wants to read data, it will first search for the required data from the cache. If it is found, it will be executed directly. If it cannot be found, it will be executed from the cache. Search in memory. Since the cache runs much faster than the memory, the role of the cache is to help the hardware run faster

Because the cache often uses RAM (non-permanent storage that is lost when power is turned off), so when it is used up In the end, the files will still be sent to storage such as hard drives for permanent storage. The largest cache in a computer is the memory stick. The fastest ones are the L1 and L2 caches built into the CPU. The video memory of the graphics card is a cache for the graphics card's computing chip. There is also a 16M or 32M cache on the hard disk.

Disclaimer

All resources on this site are contributed by netizens or reprinted by major download sites. Please check the integrity of the software yourself! All resources on this site are for learning reference only. Please do not use them for commercial purposes. Otherwise, you will be responsible for all consequences! If there is any infringement, please contact us to delete it. Contact information: admin@php.cn

How Do I Link Static Libraries That Depend on Other Static Libraries?

13 Dec 2024

Linking Static Libraries to Other Static Libraries: A Comprehensive ApproachStatic libraries provide a convenient mechanism to package reusable...

Why Do PHP Developers Use Leading Underscores in Class Methods?

11 Nov 2024

Hidden Truths: The Leading Underscore in PHP Class MethodsWhen browsing PHP libraries, one might stumble upon class methods prefixed with a...

Why Do Some PHP Class Methods Start with an Underscore?

09 Nov 2024

Why Do Some PHP Class Methods Begin with an Underscore?While exploring PHP libraries, you might have noticed that certain developers prefer to...

Does PHP Offer a BigInteger Class for Large Integer Handling?

21 Oct 2024

BigInteger Class in PHPDoes PHP include a BigInteger class for handling large integers? If so, how is it accessed and utilized?Answer:While PHP does not natively include a BigInteger class, external libraries can provide this functionality. Two notab