A simple page cache, the effect is still more obvious
/ * Page Cache Mechanism * Summary: Page Cache Mechanism * Class Name: SimpleCache * File Name: SimpleCache_Class.php * Version: 0.0.2 * Creation Time: 2004.7.24 03:38 * Modification Time: 2004.11.28 23:28 * OF: shadow_wwp@yahoo.com * copyright: cOPYRIGHT (C) 2004-2005 streaming video studio * / / * Usage require_once ( "SimpleCache.php"); $ effect_param = array ( "a", "b", " c "," d "," e "); $ effect_flag_param = array (" a "," b "," c "); $ cache = new simplecche (); $ cache-> start (5, $ effect_param, $ Effect_flag_param); // --- // echo "hhhh"; // - - // $ cache-> end (); * / define ("cache_no_create", "no"
Define ("cache_create", "yes"
); Define ("cache_create_fault", "err"
);
// Cache class path Define ("root", "/ data1"
Define ("cache", root. "/ cache"
Class
SimpleCache
{Var $ filename;
// The file name to save var $ flag
; Var $ EFFECT_TIME
Var $ cache_error
;
/ / The following is a 0.0.2 version update var $ effect_PARAM = Array ();
// Valid parameter var $ effect_flag_param = array ();
// Mark type parameter var $ cache_path;
// To save the file directory name // Enable cache // $ flag cache_create ob_start boot // $ flag cache_no_create does not need to create a cache read cache // $ flag cache_create_fault creation cache failed //0.0.2 update function start ($ Effect, $ Effect_Param, $ Effect_Flag_Param
) {$ This-> Effect_time = $ Effect
; If (! Is_ARRAY ($ EFFECT_PARAM
)) {$ This-> flag = cache_create_fault
$ This-> cache_error. = "/N"."/$Effect_param is not an array"
} Else {$ this-> Effect_Param = $ Effect_Param;}} (! Is_ARRAY ($ this-> Effect_Flag_Param
)) {$ This-> flag = cache_create_fault
$ This-> cache_error. = "/N"."effect_flag_param is not an array"
} Else {$ this-> effect_flag_param = $ effect_flag_param
} $ This-> IS_EXPIRE
(); IF ($ this-> flag == cache_no_create)
// Read the signal to see if it should be created
{$ This-> cache_read
();}} ($ This-> flag == cache_create
) {If (! OB_Start
()) {$ This-> flag = cache_create_fault
$ This-> cache_error. = "/ N". "Ob_start () failed! / N"
}}
// debug echo "/ n flag. "-> / n";
}
/ / Enable the cache end function end
() {IF ($ this-> flag == cache_create
) {
// Create a file if (! $ This-> Create_Cache
()) {$ This-> flag = cache_create_fault
$ This-> cache_error. = "/ N". "Create Cache Fail / N"
EXIT (0
}
/ / Mark Next No Buy $ this-> Flag = Cache_NO_CREATE
}}
/ / Judgment if the cache file is expired //0.0.2 Optimization Function is_expire
() {If (! $ This-> get_filename
()) {$ This-> cache_error. = "/ N". "Cannot Generate File Name!"
; $ This-> flag = cache_create_fault
Return 0
} $ Now = Time (); if (! File_exists ($ this-> filename
)) {$ This-> flag = cache_create
Return 0
} $ Cretetime = filemtime ($ this-> filename
$ TIME_FIELD = $ now - $ CREATETIME
;
// debug echo "/ n / n"; IF ($ TIME_FIELD> $ this-> Effect_time
) {$ This-> flag = cache_create
Return 0
} $ This-> flag = cache_no_create
}
/ / Name // Naming Rules Yes: Parameter _ Parameter Value _ Created File Name //0.0.2 Optimization Function Get_FileName
() {If (! $ This-> GET_DIR
()) {$ This-> cache_error. = "/ N". "Cannot get a directory"
Return False
} Foreach ($ this-> effect_Param as $ key
) {$ This-> filename = $ this-> filename. "_". $ Key. "_". $ _ Request [$ key
} $ This-> filename = md5 ($ this-> filename). "_" .Basename ($ _ server ["php_self"
]); $ This-> filename = $ this-> cache_path. "/". $ This-> filename
Return True
}
// Get the directory name If the directory does not exist, create a //0.0.2 to increase the function get_dir
() {$ This-> cache_path = cache
Foreach ($ this-> effect_flag_param as $ key
) {$ This-> cache_path = $ this-> cache_path. "/". MD5 ($ _ request [$ key
]); If (! $ This-> check_dir
()) {RETURN FALSE
}} Return true
}
// Detecting the directory name If there is no existence, create a //0.0.2 increase function check_dir () {if (! Is_dir ($ this-> cache_path
)) {If (! Mkdir ($ this-> cache_path
)) {$ This-> cache_error. = "/ N". "Can't create a cache directory!"
Return False
}} Return true
}
/ / Take data from the cache Function Cache_read
() {Include ($ this-> filename
Die ();
/ / Generate Cache Page Function Create_Cache
() {$ This-> info
();
// Write this page to file IF (! ($ Fp = fopen ($ this-> filename, "w"
)) {RETURN FALSE
}} If (! $ Fp
) {Echo $ this-> filename
FLOCK ($ FP, 2
); If (! Fputs ($ fp, ob_get_contents
())) {RETURN FALSE
Flock ($ fp, 3
Fclose ($ FP)
);
// Write to complete OB_END_FLUSH
();
// ob_end_clean (); return true
}
// Print debugging information Function Info
() {
#echo "/ n
Echo "file name:" $ this-> filename. "/ N"
Echo "Valid Period:" $ this-> Effect_time. "/ N"
Echo "Cache Directory:" $ this-> cache_path. "/ N"
; Echo created cache name: ". BaseName ($ _ server [" php_self "])." / N "
; Echo "------------------------------------------- / n "
Echo $ this-> cache_error. "/ N"
; Echo "------------------------------------------- / n "
;
#echo "-> / n";
}
?>
