获取ip
function getip() {
if (isset ( $_SERVER )) {
if (isset ( $_SERVER ['HTTP_X_FORWARDED_FOR'] )) {
$aIps = explode ( ',', $_SERVER ['HTTP_X_FORWARDED_FOR'] );
foreach ( $aIps as $sIp ) {
$sIp = trim ( $sIp );
if ($sIp != 'unknown') {
$sRealIp = $sIp;
break;
}
}
} elseif (isset ( $_SERVER ['HTTP_CLIENT_IP'] )) {
$sRealIp = $_SERVER ['HTTP_CLIENT_IP'];
} else {
if (isset ( $_SERVER ['REMOTE_ADDR'] )) {
$sRealIp = $_SERVER ['REMOTE_ADDR'];
} else {
$sRealIp = '0.0.0.0';
}
}
} else {
if (getenv ( 'HTTP_X_FORWARDED_FOR' )) {
$sRealIp = getenv ( 'HTTP_X_FORWARDED_FOR' );
} elseif (getenv ( 'HTTP_CLIENT_IP' )) {
$sRealIp = getenv ( 'HTTP_CLIENT_IP' );
} else {
$sRealIp = getenv ( 'REMOTE_ADDR' );
}
}
return $sRealIp;
}
session 操作
<?php
/**
该类为session中用于操作session的各中处理
如果该类配置正常，在$_SESSION中的数据会以数据库的形式保存。
通过 session_id()操作可实现session的共享，使多应用可进行同步操作和登录。
这个是上次搞qq绑定时，保留下来的哈。不过网上多如牛毛。咱就不多说了。
*/
$aConfig = array (
'session' => '1',
'db' => array (
'host' => 'localhost',
'user' => 'root',
'pass' => '',
'name' => 'test'
)
);
new session ( $aConfig );
class session {
/*
* 数据库接口
*/
private $oDB;
function __construct($aConfig) {
session_cache_limiter ( 'private, must-revalidate' );
session_cache_expire ( 1800 );
@ini_set ( 'session.cookie_lifetime', 0 );
@ini_set ( 'session.cookie_httponly', TRUE );
@ini_set ( 'session.use_cookies', 1 );
@ini_set ( 'session.use_only_cookies', 1 );
@ini_set ( 'session.use_trans_sid', 0 );
@ini_set ( 'session.gc_probability', 1 );
@ini_set ( 'session.gc_divisor', 1 );
@ini_set ( 'session.gc_maxlifetime', 1800 );
if ($aConfig ["session"] == 1) {
$this->oDB = mysql_connect ( $aConfig ["db"] ["host"], $aConfig ["db"] ["user"], $aConfig ["db"] ["pass"] );
mysql_select_db ( $aConfig ["db"] ["name"], $this->oDB );
mysql_query ( "SET NAMES UTF8", $this->oDB );
session_set_save_handler ( array (
&$this,
"open"
), array (
&$this,
"close"
), array (
&$this,
"read"
), array (
&$this,
"write"
), array (
&$this,
"destory"
), array (
&$this,
"gc"
) );
} elseif ($aConfig ["session"] == 2) {
@ini_set ( 'session.save_handler', 'memcache' );
@ini_set ( "session.save_path", "tcp://" . $aConfig ["mem"] ["host"] . ":" . $aConfig ["mem"] ["port"] );
}
session_start ();
}
function open($session_save_path, $session_name) {
return true;
}
function close() {
return true;
}
function write($key, $value) {
$query = mysql_query ( "select * from `sessions` where `sessionkey`='" . $key . "'", $this->oDB );
if (mysql_num_rows ( $query ) == 0) {
mysql_query ( "insert into `sessions` set `sessionkey`='" . $key . "',`sessionvalue`='" . $value . "',`sessionip`='" . getip () . "', `sessionexpiry` ='" . date ( "Y-m-d H:i:s", strtotime ( "+1800 seconds" ) ) . "'", $this->oDB );
} else {
mysql_query ( "update `sessions` set `sessionvalue`='" . $value . "',`sessionip`='" . getIp () . "',`sessionexpiry`='" . date ( "Y-m-d H:i:s", strtotime ( "+1800 seconds" ) ) . "' where `sessionkey`='" . $key . "'", $this->oDB );
}
}
function read($key) {
$Query = mysql_query ( "select `sessionvalue` from `sessions` where `sessionkey`='" . $key . "' and `sessionexpiry`>'" . date ( "Y-m-d H:i:s" ) . "' and `sessionip`='" . getIp () . "'", $this->oDB );
$aValue = mysql_fetch_assoc ( $Query );
if (empty ( $aValue )) {
return NULL;
}
return $aValue ["sessionvalue"];
}
function gc() {
return mysql_query ( "delete from `sessions` where `sessionexpiry`<='" . date ( "Y-m-d H:i:s" ) . "'", $this->oDB );
}
function destory($key) {
return mysql_query ( "delete from `sessions` where `sessionkey`='" . $key . "'", $this->oDB );
}
}
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