How to solve the problem of data caching when developing Wechat by PHP
This article mainly explains "PHP Wechat development how to solve the data cache problem", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "PHP Wechat development how to solve the data cache problem" bar!
When using php for Wechat development, we encounter the problem of long-term preservation of access_token. In the past, we used to use Cache in the framework to directly set and get. Now there is no framework available, so I have no choice but to write a cache for temporary use.
This Cache class is used to cache some timely data, such as access_token of Wechat basic interface, access_token of web page Auth verification, etc.
The following code uses local files for data caching
/ / Test $cache = new Cache (); $cache- > dir = ".. / cc/"; / / $cache- > setCache ("zhang", "zhangsan", 100); echo $cache- > getCache ("zhang"); / / $cache- > removeCache ("zhang"); $cache- > setCache ("liu", "liuqi", 100); echo $cache- > getCache ("liu"); class Cache {public $cacheFile = "cache.json"; / / File public $dir = ". / cach3/" / directory / / cache public function setCache ($name, $val, $expires_time) {$file = $this- > hasFile (); / / string conversion array $str = file_get_contents ($file); $arr = json_decode ($str, true); / / empty, remove the cache if (empty ($val)) {unset ($arr [$name]);} else {$arr [$name] = array ("value" = > $val, "expires_time" = > $expires_time, "add_time" = > time ()) } / / Array to string $str = json_encode ($arr); file_put_contents ($file, $str);} public function getCache ($name) {$file = $this- > hasFile (); / / string to array $allArr = json_decode ($str, true); $arr = $allArr [$name]; if (! $arr | | time () > ($arr ["expires_time"] + $arr ["add_time"]) {$this- > removeCache ($name); / overdue removal return false;} return $arr ["value"] } public function removeCache ($name) {$this- > setCache ($name,', 0);} private function hasFile () {/ / if no cache file exists, create an if (! file_exists ($this- > dir)) {mkdir ($this- > dir);} if (! file_exists ($this- > dir. $this- > cacheFile) {touch ($this- > dir. $this- > cacheFile);} return $this- > dir. $this- > cacheFile;}}
The above Cache class has three operations: set, get, and remove. You can also customize the save path of the cache file, as long as you set the dir property of Cache.
Thank you for your reading, the above is the content of "how to solve the data caching problem when PHP develops Wechat". After the study of this article, I believe you have a deeper understanding of how to solve the problem of data caching in PHP Wechat development, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!
