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cookie參數(shù)值

setcookie()的比較重要的屬性

緩存特性比較

http兩大特性：無狀態(tài)，無連接。

由于http無狀態(tài)的特性，要實(shí)現(xiàn)購物車和用戶識(shí)別等功能，需要會(huì)話控制技術(shù)，而會(huì)話控制使用cookie和session技術(shù)實(shí)現(xiàn)。

php自定義session 調(diào)用方式

php logout?

$_SESSION=[];

if (init_get('session.use_cookies')) {

$params = session_get_cookie_params();

setcookie(session_name, '', time()-1, $params['path'], $params['domain'], $params['secure'], $params['httponly']);

}

session_destroy();

header('location:login.php');

PHP驗(yàn)證碼

mysqli_connect

mysqli_set_charset

mysqli_select_db

mysqli_escape_string

mysqli_query

mysqli_num_rows

mysqli_fetch_assoc

setcookie('auth', $auth, strtotime('+7 days'))

exit('<script>alert("aaa");location.href="login.php";</script>');

addfdfewf

abc

<?php

/**

*Cookie的設(shè)置、讀取、更新、刪除

*/

class CustomCookie{

static private $_instance = null;

private $expire = 0;

private $path = '';

private $domain = '';

private $secure = false;

private $httponly = false;

/**

*構(gòu)造函數(shù)完成Cookie參數(shù)初始化工作

*@param [array] $options Cookie相關(guān)選項(xiàng)

*/

private function __constrct(array $options = []){

$this->setOptions($options);

}

/**

*設(shè)置相關(guān)選項(xiàng)

*@param array $options ?Cookie相關(guān)選項(xiàng)

*/

private function setOptions(array $options = []){

if(isset($options['expire'])){//是否設(shè)置cookie過期時(shí)間

$this->expire = (int)$options['expire'];

}

if(isset($options['path'])){

$this->path = $options['path'];

}

if(isset($options['domain'])){

$this->domain = $options['domain'];

}

if(isset($options['secure'])){

$this->secure = (bool)$options['secure'];

}

if(isset($options['httponly'])){

$this->httponly = (bool)$options['httponly'];

}

return $this;

}

/**

*單例模式

*@param [array] $options Cookie相關(guān)選項(xiàng)

*@return object 對(duì)象實(shí)例

*/

public static function getInstance(array $options = []){

if(is_null(self::$_instance)){

$class = __CLASS__;

self::$_instance = new $class($options);

}

return self::$_instance;

}

/**

*設(shè)置Cookie

*@param string $name Cookie名

*@param mixed ?$value Cookie值

*@param array ?$options 其它選項(xiàng)

*

*/

public function set(string $name, $value, array $options = []){

if(is_array($options)&&count($options)>0){

$this->setOptions($options);

}

if(is_array($value) || is_object($value)){

$value = json_encode($value, JSON_FORCE_OBJECT);

}

setCookie($name, $value, $this->expire, $this->domain, $this->secure, $this->httponly);

}

/**

*獲取Cookie

*@param String $name Cookie名

*@return mixed ?返回一個(gè)null或者一個(gè)對(duì)象

*/

public function get(string $name){

if(isset($_COOKIE[$name])){

return substr($_COOKIE[$name], 0, 1) == '{' ? json_decode($_COOKIE[$name] : $_COOKIE[$name]);

}else{

return null;

}

}

/**

*刪除指定Cookie

*

*/

public function delete(string $name){

}

}

//測試

$cookie = CustomCookie::getInstance();

//var_dump($cookie);

$cookie->set('aa', 11);

$cookie->set('bb', 22);

$cookie->set('cc', 33, ['expire'=>time()+3600])

$cookie->set('userInfo', ['username'=>'shulv', 'age'=>22]);

//var_dump($cookie->get('userInfo'));

var_dump($cookie->get('aa'));

<?php/***Cookie的設(shè)置、讀取、更新、刪除*/class?CustomCookie{		static?private?$_instance?=?null;	private?$expire?=?0;	private?$path?=?'';	private?$domain?=?'';	private?$secure?=?false;	private?$httponly?=?false;	/**	*構(gòu)造函數(shù)完成Cookie參數(shù)初始化工作	*@param?[array]?$options?Cookie相關(guān)選項(xiàng)	*/	private?function?__constrct(array?$options?=?[]){		$this->setOptions($options);	}		/**	*設(shè)置相關(guān)選項(xiàng)	*@param?array?$options??Cookie相關(guān)選項(xiàng)	*/	private?function?setOptions(array?$options?=?[]){		if(isset($options['expire'])){//是否設(shè)置cookie過期時(shí)間			$this->expire?=?(int)$options['expire'];		}		if(isset($options['path'])){			$this->path?=?$options['path'];		}		if(isset($options['domain'])){			$this->domain?=?$options['domain'];		}		if(isset($options['secure'])){			$this->secure?=?(bool)$options['secure'];		}		if(isset($options['httponly'])){			$this->httponly?=?(bool)$options['httponly'];		}		return?$this;	}	/**	*單例模式	*@param?[array]?$options?Cookie相關(guān)選項(xiàng)	*@return?object?對(duì)象實(shí)例	*/	public?static?function?getInstance(array?$options?=?[]){		if(is_null(self::$_instance)){			$class?=?__CLASS__;			self::$_instance?=?new?$class($options);		}		return?self::$_instance;	}	/**	*設(shè)置Cookie	*@param?string?$name?Cookie名	*@param?mixed??$value?Cookie值	*@param?array??$options?其它選項(xiàng)	*	*/	public?function?set(string?$name,?$value,?array?$options?=?[]){		if(is_array($options)&&count($options)>0){			$this->setOptions($options);		}		if(is_array($value)?||?is_object($value)){			$value?=?json_encode($value,?JSON_FORCE_OBJECT);		}		setCookie($name,?$value,?$this->expire,?$this->domain,?$this->secure,?$this->httponly);	}	/**	*獲取Cookie	*@param?String?$name?Cookie名	*@return?mixed??返回一個(gè)null或者一個(gè)對(duì)象	*/	public?function?get(string?$name){		if(isset($_COOKIE[$name])){			return?substr($_COOKIE[$name],?0,?1)?==?'{'???json_decode($_COOKIE[$name]?:?$_COOKIE[$name]);		}else{			return?null;		}	}	/**	*刪除指定Cookie	*	*/	public?function?delete(string?$name){			}}//測試$cookie?=?CustomCookie::getInstance();//var_dump($cookie);$cookie->set('aa',?11);$cookie->set('bb',?22);$cookie->set('cc',?33,?['expire'=>time()+3600])$cookie->set('userInfo',?['username'=>'shulv',?'age'=>22]);//var_dump($cookie->get('userInfo'));var_dump($cookie->get('aa'));

mysql_real_escape_string() 函數(shù)轉(zhuǎn)義 SQL 語句中使用的字符串中的特殊字符。

mysqli_escape_string?—?別名?mysqli_real_escape_string()? （可以預(yù)防數(shù)據(jù)庫攻擊）

例子 3

預(yù)防數(shù)據(jù)庫攻擊的正確做法：

<?php
function?check_input($value)
{//?去除斜杠if?(get_magic_quotes_gpc())
??{
??$value?=?stripslashes($value);
??}//?如果不是數(shù)字則加引號(hào)if?(!is_numeric($value))
??{
??$value?=?"'"?.?mysql_real_escape_string($value)?.?"'";
??}
return?$value;
}

$con?=?mysql_connect("localhost",?"hello",?"321");
if?(!$con)
??{
??die('Could?not?connect:?'?.?mysql_error());
??}//?進(jìn)行安全的?SQL$user?=?check_input($_POST['user']);
$pwd?=?check_input($_POST['pwd']);
$sql?=?"SELECT?*?FROM?users?WHERE
user=$user?AND?password=$pwd";

mysql_query($sql);

mysql_close($con);
?>