Php Data caching program _ PHP Tutorial

Php implements the data cache program .? Php *** cacheclass * classCache {*** cachepath *** @ varstring * var $ cache_path; *** timeout *** @ varinteger * var $ time60; * ** constructforthisclass ** @ p /**
* Cache class
*/

Class Cache {
/**
* Cache path
*
* @ Var string
*/
Var $ cache_path;
/**
* Timeout
*
* @ Var integer
*/
Var $ time = 60;

/**
* Construct for this class
*
* @ Param string $ cache_path
* @ Return Cache
*/
Function Cache ($ cache_path = 'cache '){
If (is_dir ($ cache_path )){
$ This-> cache_path = rtrim ($ cache_path ,'/').'/';
} Else {
Die ('cache dir is not exists .');
}
}

/**
* Set timeout
*
* @ Param integer $ time
* @ Return boolean
*/
Function setTime ($ time ){
If (isset ($ time) & is_integer ($ time )){
$ This-> time = $ time;
Return true;
} Else {
Return false;
}
}

/**
* Read cache
*
* @ Param string $ cache_id
* @ Return mixed
*/
Function read ($ cache_id ){
$ Cache_file = $ this-> cache_path. $ cache_id. '. caccache ';
If (! File_exists ($ cache_file )){
Return false;
}
$ Mtime = filemtime ($ cache_file );
If (time ()-$ mtime)> $ this-> time ){
Return false;
} Else {
$ Fp = fopen ($ cache_file, 'r ');
$ Content = fread ($ fp, filesize ($ cache_file ));
Fclose ($ fp );
Unset ($ fp );
If ($ content ){
Return unserialize ($ content );
} Else {
Return false;
}
}
}

/**
* Write cache in a file
*
* @ Param string $ content
* @ Param string $ cache_id
* @ Return boolean
*/
Function write ($ content, $ cache_id ){
$ Cache_file = $ this-> cache_path. $ cache_id. '. caccache ';
If (file_exists ($ cache_file )){
@ Unlink ($ cache_file );
}
$ Fp = fopen ($ cache_file, 'w ');
$ Content = serialize ($ content );
If (fwrite ($ fp, $ content )){
Fclose ($ fp );
Unset ($ fp );
Return true;
} Else {
Fclose ($ fp );
Unset ($ fp );
Return false;
}
}

/**
* Clean all cache
*
* @ Param string $ path
* @ Return boolean
*/
Function cleanCache ($ path = 'cache '){
If (is_dir ($ path )){
$ Path = rtrim ($ path ,'/').'/';
$ Handler = opendir ($ path );
While ($ f = readdir ($ handler ))! = False ){
If (! Is_dir ($ f )){
If ($ f! = '.' & $ F! = '..'){
@ Unlink ($ path. $ f );
}
} Else {
$ This-> cleanCache ($ f );
}
}
} Else {
Return false;
}
}
}

?>

Http://www.bkjia.com/PHPjc/630437.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/630437.htmlTechArticle? Php/*** cache class */class Cache {/*** cache path ** @ var string */var $ cache_path; /*** timeout *** @ var integer */var $ time = 60;/*** construct for this class *** @ p...