How to implement caching code in php-PHP Problem-php.cn

php method to implement cache class code: [$cache = new Cache(); $values = $cache->get($key); if ($values == false) {$cache-> ;put($key, $values)...].

How to implement caching code in php

The operating environment of this article: windows10 system, php 7, thinkpad t480 computer.

Instructions for use:

1. Instantiation

$cache = new Cache();

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2. Set cache time and cache directory

$cache = new Cache(60, '/any_other_path/');

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The first parameter is cache Seconds, the second parameter is the cache path, configure it as needed.
By default, the cache time is 3600 seconds, the cache directory is cache/

3, read cache

$value = $cache->get('data_key');

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4, write cache

$value = $cache->put('data_key', 'data_value');

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Complete example:

$cache = new Cache(); //从缓存从读取键值 $key 的数据 $values = $cache->get($key); //如果没有缓存数据 if ($values == false) { //insert code here... //写入键值 $key 的数据 $cache->put($key, $values); } else { //insert code here... }

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Cache.class.php

cache_expire=$exp_time; $this->cache_path=$path; } //returns the filename for the cache private function fileName($key){ return $this->cache_path.md5($key); } //creates new cache files with the given data, $key== name of the cache, data the info/values to store public function put($key, $data){ $values = serialize($data); $filename = $this->fileName($key); $file = fopen($filename, 'w'); if ($file){//able to create the file fwrite($file, $values); fclose($file); } else return false; } //returns cache for the given key public function get($key){ $filename = $this->fileName($key); if (!file_exists($filename) || !is_readable($filename)){//can't read the cache return false; } if ( time() < (filemtime($filename) + $this->cache_expire) ) {//cache for the key not expired $file = fopen($filename, "r");// read data file if ($file){//able to open the file $data = fread($file, filesize($filename)); fclose($file); return unserialize($data);//return the values } else return false; } else return false;//was expired you need to create new } } ?>

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