If the traffic is large, it will be a huge burden on the database, so it is very necessary to do the PHP data cache (cache) for the content of the change infrequently, I have made a simple php "file cache" class, I hope to be helpful to everyone.
The idea is this:
For the general variable, the variable into the PHP language format, write to the file, as long as the include this file is equivalent to loading the cache;
For the variant of the array type, the array is converted to the PHP language definition array string, written to the file, as long as the include is equivalent to loading the cache;
Cached cache time control, by obtaining the cache file creation time and the current time to compare, if not to update time, directly read the cache, if the update time, query the database, return data, and then update the cache. (not yet implemented)
here is my Php-kcache class (php_kcache_class.php):
Note: If the string is cached, write the escape character one more ' \ ', or ' \ n ' to be written as "\\n".
Copy CodeThe code is as follows:
/*
Php-kcache class v_0.1
Author:kangzj
email:kangzj@mail.bnu.edu.cn
blog:http://kangzj.net.ru
The author does not guarantee that this program does not have a bug, for the use of this program
Without any responsibility for any problems arising.
*/
Class Php_kcache {
Relative or absolute directory, do not add '/' at the end
var $cache _dir = './cache ';
var $cache _extension = '. cache.php ';
function Set_cache ($name, $value) {
$pre = "< \n//cache Created at:". Date (' y-m-d h:i:s '). " \ n ";
if (!is_array ($value)) {
$value = $value;
$str = "\$ $name = ' $value ';";
}else{
$str = "\$ $name =". $this->arrayeval ($value). ';';
}
$end = "\n?>";
echo $cache = $pre. $str. $end;
$cache _file = $this->cache_dir. '/' . $name. $this->cache_extension;
if ($fp = @fopen ($cache _file, ' WB ')} {
Fwrite ($fp, $cache);
Fclose ($FP);
return true;
} else {
echo $cache _file;
Exit (' Can not write to cache files, check cache directory ');
return false;
}
}
Converts an array into a string from discuz!
function Arrayeval ($array, $level = 0) {
if (!is_array ($array)) {
Return "'". $array. "'";
}
$space = ";
for ($i = 0; $i < = $level; $i + +) {
$space. = "\ T";
}
$evaluate = "Array\n$space (\ n";
$comma = $space;
if (Is_array ($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";
}
$comma = ", \n$space";
}
}
$evaluate. = "\n$space)";
return $evaluate;
}
}
The simplest method of invocation:
Copy CodeThe code is as follows:
Include './php_kcache_class.php ';
$pc = new Php_kcache;
$a = Array (' A ', ' B ', ' C ');
$pc->set_cache (' A ', addslashes ($a));
Complex invocation methods (plus cache time Control)--later on ... to be continued ...
http://www.bkjia.com/PHPjc/321536.html www.bkjia.com true http://www.bkjia.com/PHPjc/321536.html techarticle if the traffic is large, it will be a huge burden on the database, so it is very necessary to do a good job of PHP data cache (caching) for the content of the change infrequently, I made a simple php "article ...
