ct_dbm.inc

PHPLOB注释详细版 使用模板技术的好帮手 PHP最有用的东东了

<?php

##
## Copyright (c) 1999-2000 Daniel Lashua <[e-mail]>
##
## $Id: ct_dbm.inc,v 1.2 2000/07/12 18:22:33 kk Exp $
##
## PHPLIB Data Storage Container using DBM Files
##
## Code inspired by ct_shm.inc v 1.1 

class CT_DBM {
	##
	## Define these parameters by overwriting or by
	## deriving your own class from it (recommened)
	##

	var $dbm_file = "";    ## PREEXISTING DBM File 
			       ## writable by the web server UID

	## end of configuration
	
	var $dbmid;	       ## our dbm resource handle
	
	function ac_start() {
		# Open DBM file for write access
		$this->dbmid = dbmopen($this->dbm_file, "w");
	}

	function ac_get_lock() {
		# Not needed in this instance
	}

	function ac_release_lock() {
		# Not needed in this instance
	}

	function ac_newid($str, $name) {
		return $str;
	}

	function ac_store($id, $name, $str) {
		dbmreplace($this->dbmid, "$id$name", urlencode($str).";".time());
		return true;
	}

	function ac_delete($id, $name) {
		dbmdelete($this->dbmid, "$id$name");
	}

	function ac_gc($gc_time, $name) {
		$cmp = time() - $gc_time * 60;
		$i = dbmfirstkey($this->dbmid);
		while ($i) {
			$val = @dbmfetch($this->dbmid, $i);
			$dat = explode(";", $val);
			if(strcmp($dat[1], $cmp) < 0) {
				dbmdelete($this->dbmid, $i);
			}
			$i = dbmnextkey($this->dbmid,$i);
		}
	}

	function ac_halt($s) {
		echo "<b>$s</b>";
		exit;
	}

	function ac_get_value($id, $name) {
		$dat = explode(";", dbmfetch($this->dbmid, "$id$name"));
		return urldecode($dat[0]);
	}
}
?>