Home Backend Development PHP Tutorial 常见php数据文件缓存类汇总_php技巧

常见php数据文件缓存类汇总_php技巧

May 16, 2016 pm 08:28 PM
php data document kind cache

本文实例汇总了常见php数据文件缓存类。分享给大家供大家参考。具体分析如下:

数据文件缓存的做法我们常用的有php文件缓存与利用memcache来缓存数据,下面面我分别总结了memcache缓存数据与数据文件缓存。感兴趣的朋友可以参考一下。

1.对于一般的变量,把该变量变成php语言的格式,写到文件中,用时只要include这个文件就相当于加载了cache了.

2.对于array型的变量,把array转化为php语言定义array的字符串,写到文件中,用时也只要include就相当于加载了cache了.

3.缓存cache时间上的控制,通过获取缓存文件的创建时间和现在的时间进行对比,如果没有到更新时间,直接读取缓存,如果到了更新时间,查询数据库.

文件缓存类,代码如下:

复制代码 代码如下:
class DataCache
{
 /**
  * 数组转换
  *
  * @param array $array
  * @param string $arrayName
  * @param array $level
  *
  * @return string
  */
 private function arrayEval($array, $arrayName = '', $level = 0)
 {
  $space = str_repeat("t", $level);
 
  if (emptyempty($arrayName))
  {
   $evaluate = "arrayn$space(n";
  }
  else
  {
   $evaluate = "${$arrayName} = arrayn$space(n";
  }
 
  $space2 = str_repeat("t", $level + 1);
  $comma = $space2;
  if (!emptyempty($array))
  {
   foreach ($array as $key => $val)
   {
    $key = is_string($key) ? ''' . addcslashes($key, ''\') . ''' : $key;
    $val = !is_array($val) && (!preg_match('/^-?[1-9]d*$/', $val) || strlen($val) > 12) ? ''' . addcslashes($val, ''\') . ''' : $val;
    if (is_array($val))
    {
     $evaluate .= "$comma$key => " . arrayEval($val, '', $level + 1);
    }
    else
    {
     $evaluate .= "$comma$key => $val";
    }
    $comma = ",n$space2";
   }
  }
  $evaluate .= "n$space)";
 
  // 最后才需要一个“;”
  if ($level == 0)
  {
   $evaluate .= ";";
  }
  return $evaluate;
 }
 
 /**
  * 写入缓存
  *
  * @param string $path
  * @param string $arrayName
  * @param array  $data
  *
  * @return boolean
  */
 public static function writeCache($path, $arrayName, $data)
 {
  if ($handle = fopen($path, 'w+'))
  {
   $data = self::arrayEval($data, $arrayName);
 
   $dataConvert = "  
   flock($handle, LOCK_EX);
   $rs = fputs($handle, $dataConvert);
   flock($handle, LOCK_UN);
   fclose($handle);
   if ($rs !== false)
   {
    return true;
   }
  }
  return false;
 }
}
?>

调用方法,代码如下:
复制代码 代码如下:
/**
* 生成文件缓存
*
* @param string $filePath 缓存文件的保存路径
* @param string $arrayName 存放在缓存文件中的数组名称
* @param array $data 数据
*
* @return boolean
*/
DataCache::writeCache($filePath, $arrayName, $data);

memcache来缓存数据,这里提供这个文件缓存的类,代码如下:
复制代码 代码如下:
/**
 * 文件缓存类
 * 提供文件缓存
 */
class Cache_FileCache{
    
    /**
     * 设置缓存
     * @param $key 缓存的关键字key
     * @param $data 缓存的内容
     * @param $cacheLife 缓存时间(单位为秒)如果为0 则表示无限时间
     * @return Bool
     */
    public static function setCache($key,$data,$cacheLife)
    {
            if(file_exists(__SITE_FILE_CACHE))
            {
                @$file                =  __SITE_FILE_CACHE . "/" . $key .".php";
                $cache                  =  array();
                $time                =  __SYS_TIME;
                $cache['content']    =  $data;
                $cache['expire']    =  $cacheLife === 0 ? 0 : $time+$cacheLife;
                $cache['mtime']        =  $time;
                $cache                =  serialize($cache);
                $setReslut            =  @file_put_contents($file,$cache) or self::error(__line__,"文件写入出错");
                $chmodReslut        =  @chmod($file,0777) or self::error(__line__,"设定文件权限失败");
                if($setReslut && $chmodReslut)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
    }
 
    /**
     * 得到缓存数据
     * @param $key 缓存的关键字key
     * @return array
     */
    public static function getCache($key)
    {
            @$file                =      __SITE_FILE_CACHE . "/" . $key .".php";
            if(file_exists($file))
            {
                     $data        =    @file_get_contents($file);
                     $data        =   unserialize($data);
                     if($data['expire']==0 || $data['expire'] > __SYS_TIME)
                     {
                         return $data['content'];
                     }
                     else 
                     {
                         unlink($file);
                         return array();
                     }
            }        
    }
    
    /**
     * 删除缓存文件
     * @param $key 缓存$key
     * @return Bool
     */
    public static function delCache($key)
    {        
        if (@unlink(__SITE_FILE_CACHE."/".$key.".php"))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    
    /**
     * 清除所有缓存文件
     * @return Bool
     */
    
    public static function clearAllCache()
    {
        $files = scandir(__SITE_FILE_CACHE);
        foreach ($files as $val)
        {
            @unlink(__SITE_FILE_CACHE."/".$val);
        }
    }
    
    /**
     * 出错处理函数
     * @param $line 行数
     * @param $msg  信息
     */
    public static function error($line,$msg)
    {
        die("出错文件:".__file__."/n出错行:$line/n错误信息:$msg");
    }
}
?>

希望本文所述对大家基于ThinkPHP框架的PHP程序设计有所帮助。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1665
14
PHP Tutorial
1269
29
C# Tutorial
1249
24
PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP in Action: Real-World Examples and Applications PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

The Enduring Relevance of PHP: Is It Still Alive? The Enduring Relevance of PHP: Is It Still Alive? Apr 14, 2025 am 12:12 AM

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP vs. Python: Understanding the Differences PHP vs. Python: Understanding the Differences Apr 11, 2025 am 12:15 AM

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP and Python: Code Examples and Comparison PHP and Python: Code Examples and Comparison Apr 15, 2025 am 12:07 AM

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP vs. Other Languages: A Comparison PHP vs. Other Languages: A Comparison Apr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python: Different Paradigms Explained PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

See all articles