adodb-session.php

php聊天源码

<?php


/*
V4.01 23 Oct 2003  (c) 2000-2004 John Lim ([e-mail]). All rights reserved.
         Contributed by Ross Smith ([e-mail]). 
  Released under both BSD license and Lesser GPL library license.
  Whenever there is any discrepancy between the two licenses,
  the BSD license will take precedence.
	  Set tabs to 4 for best viewing.
*/

/*
	You may want to rename the 'data' field to 'session_data' as
	'data' appears to be a reserved word for one or more of the following:
		ANSI SQL
		IBM DB2
		MS SQL Server
		Postgres
		SAP

	If you do, then execute:

		ADODB_Session::dataFieldName('session_data');

*/

if (!defined('_ADODB_LAYER')) {
	require_once realpath(dirname(__FILE__) . '/../adodb.inc.php');
}

if (defined('ADODB_SESSION')) return 1;

define('ADODB_SESSION', dirname(__FILE__));

/*!
	\static
*/
class ADODB_Session {
	/////////////////////
	// getter/setter methods
	/////////////////////

	/*!
	*/
	function driver($driver = null) {
		static $_driver = 'mysql';
		static $set = false;

		if (!is_null($driver)) {
			$_driver = trim($driver);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_DRIVER'])) {
				return $GLOBALS['ADODB_SESSION_DRIVER'];
			}
		}

		return $_driver;
	}

	/*!
	*/
	function host($host = null) {
		static $_host = 'localhost';
		static $set = false;

		if (!is_null($host)) {
			$_host = trim($host);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_CONNECT'])) {
				return $GLOBALS['ADODB_SESSION_CONNECT'];
			}
		}

		return $_host;
	}

	/*!
	*/
	function user($user = null) {
		static $_user = 'root';
		static $set = false;

		if (!is_null($user)) {
			$_user = trim($user);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_USER'])) {
				return $GLOBALS['ADODB_SESSION_USER'];
			}
		}

		return $_user;
	}

	/*!
	*/
	function password($password = null) {
		static $_password = '';
		static $set = false;

		if (!is_null($password)) {
			$_password = $password;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_PWD'])) {
				return $GLOBALS['ADODB_SESSION_PWD'];
			}
		}

		return $_password;
	}

	/*!
	*/
	function database($database = null) {
		static $_database = 'xphplens_2';
		static $set = false;

		if (!is_null($database)) {
			$_database = trim($database);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_DB'])) {
				return $GLOBALS['ADODB_SESSION_DB'];
			}
		}

		return $_database;
	}

	/*!
	*/
	function persist($persist = null) {
		static $_persist = true;

		if (!is_null($persist)) {
			$_persist = trim($persist);
		}

		return $_persist;
	}

	/*!
	*/
	function lifetime($lifetime = null) {
		static $_lifetime;
		static $set = false;

		if (!is_null($lifetime)) {
			$_lifetime = (int) $lifetime;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESS_LIFE'])) {
				return $GLOBALS['ADODB_SESS_LIFE'];
			}
		}
		if (!$_lifetime) {
			$_lifetime = ini_get('session.gc_maxlifetime');
			if ($_lifetime <= 1) {
				// bug in PHP 4.0.3 pl 1  -- how about other versions?
				//print "<h3>Session Error: PHP.INI setting <i>session.gc_maxlifetime</i>not set: $lifetime</h3>";
				$_lifetime = 1440;
			}
		}

		return $_lifetime;
	}

	/*!
	*/
	function debug($debug = null) {
		static $_debug = false;
		static $set = false;

		if (!is_null($debug)) {
			$_debug = (bool) $debug;

			$conn = ADODB_Session::_conn();
			if ($conn) {
				$conn->debug = $_debug;
			}
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESS_DEBUG'])) {
				return $GLOBALS['ADODB_SESS_DEBUG'];
			}
		}

		return $_debug;
	}

	/*!
	*/
	function expireNotify($expire_notify = null) {
		static $_expire_notify;
		static $set = false;

		if (!is_null($expire_notify)) {
			$_expire_notify = $expire_notify;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_EXPIRE_NOTIFY'])) {
				return $GLOBALS['ADODB_SESSION_EXPIRE_NOTIFY'];
			}
		}

		return $_expire_notify;
	}

	/*!
	*/
	function table($table = null) {
		static $_table = 'sessions';
		static $set = false;

		if (!is_null($table)) {
			$_table = trim($table);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_TBL'])) {
				return $GLOBALS['ADODB_SESSION_TBL'];
			}
		}

		return $_table;
	}

	/*!
	*/
	function optimize($optimize = null) {
		static $_optimize = false;
		static $set = false;

		if (!is_null($optimize)) {
			$_optimize = (bool) $optimize;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (defined('ADODB_SESSION_OPTIMIZE')) {
				return true;
			}
		}

		return $_optimize;
	}

	/*!
	*/
	function syncSeconds($sync_seconds = null) {
		static $_sync_seconds = 60;
		static $set = false;

		if (!is_null($sync_seconds)) {
			$_sync_seconds = (int) $sync_seconds;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (defined('ADODB_SESSION_SYNCH_SECS')) {
				return ADODB_SESSION_SYNCH_SECS;
			}
		}

		return $_sync_seconds;
	}

	/*!
	*/
	function clob($clob = null) {
		static $_clob = false;
		static $set = false;

		if (!is_null($clob)) {
			$_clob = strtolower(trim($clob));
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_USE_LOBS'])) {
				return $GLOBALS['ADODB_SESSION_USE_LOBS'];
			}
		}

		return $_clob;
	}

	/*!
	*/
	function dataFieldName($data_field_name = null) {
		static $_data_field_name = 'data';

		if (!is_null($data_field_name)) {
			$_data_field_name = trim($data_field_name);
		}

		return $_data_field_name;
	}

	/*!
	*/
	function filter($filter = null) {
		static $_filter = array();

		if (!is_null($filter)) {
			if (!is_array($filter)) {
				$filter = array($filter);
			}
			$_filter = $filter;
		}

		return $_filter;
	}

	/*!
	*/
	function encryptionKey($encryption_key = null) {
		static $_encryption_key = 'CRYPTED ADODB SESSIONS ROCK!';

		if (!is_null($encryption_key)) {
			$_encryption_key = $encryption_key;
		}

		return $_encryption_key;
	}

	/////////////////////
	// private methods
	/////////////////////

	/*!
	*/
	function &_conn($conn=null) {
		return $GLOBALS['ADODB_SESS_CONN'];
	}

	/*!
	*/
	function _crc($crc = null) {
		static $_crc = false;

		if (!is_null($crc)) {
			$_crc = $crc;
		}

		return $_crc;
	}

	/*!
	*/
	function _init() {
		session_module_name('user');
		session_set_save_handler(
			array('ADODB_Session', 'open'),
			array('ADODB_Session', 'close'),
			array('ADODB_Session', 'read'),
			array('ADODB_Session', 'write'),
			array('ADODB_Session', 'destroy'),
			array('ADODB_Session', 'gc')
		);
	}


	/*!
	*/
	function _sessionKey() {
		// use this function to create the encryption key for crypted sessions
		// crypt the used key, ADODB_Session::encryptionKey() as key and session_id() as salt
		return crypt(ADODB_Session::encryptionKey(), session_id());
	}

	/*!
	*/
	function _dumprs($rs) {
		$conn	=& ADODB_Session::_conn();
		$debug	= ADODB_Session::debug();

		if (!$conn) {
			return;
		}

		if (!$debug) {
			return;
		}

		if (!$rs) {
			echo "<br />\$rs is null or false<br />\n";
			return;
		}

		//echo "<br />\nAffected_Rows=",$conn->Affected_Rows(),"<br />\n";

		if (!is_object($rs)) {
			return;
		}

		require_once ADODB_SESSION.'/../tohtml.inc.php';
		rs2html($rs);
	}