php输入数据统一类实例_PHP教程

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class cls_request{

private $getdata;//存储get的数据

private $postdata;//存储post的数据

private $requestdata;//存储request的数据

private $filedata;//存储file的数据

private $cookiedata;//存储cooki

static $_instance;//本类的实例

private function __construct(){

$this->getdata = self::format_data($_GET);

$this->postdata = self::format_data($_POST);

$this->requestdata = array_merge($this->getdata,$this->postdata);

$this->cookiedata = self::format_data($_COOKIE);

$this->filedata = self::format_data($_FILES);

}

//类的初始化，返回cls_request对象

public static function get_instance(){

if(!(self::$_instance instanceof self)){

self::$_instance = new self();

}

return self::$_instance;

}

//获取GET传递过来的数值变量

public function get_num($key){

if(!isset($this->getdata[$key])){

return false;

}

return $this->to_num($this->getdata[$key]);

}

//获取POST传递过来的数据变量

public function post_num($key){

if(!isset($this->postdata[$key])){

return false;

}

return $this->to_num($this->postdata[$key]);

}

//获取Request传递过来的数值变量

public function request_num($key){

if(!isset($this->requestdata[$key])){

return false;

}

return $this->to_num($this->requestdata[$key]);

}

//获取Cookie传递过来的数值变量

public function cookie_num($key){

if(!isset($this->cookiedata[$key])){

return false;

}

return $this->to_num($this->cookiedata[$key]);

}

//获取File传递过来的数值变量

public function filedata($key){

return $this->filedata[$key];//返回数组

}

//获取GET传递过来的字符串变量

public function get_string($key,$isfilter=true){

if(!isset($this->getdata[$key])){

return false;

}

if($isfilter){

return $this->filter_string($this->getdata[$key]);

}else{

return $this->getdata[$key];

}

}

//获取POST传递过来的字符串变量

public function post_string($key,$isfilter=true){

if(!isset($this->postdata[$key])){

return false;

}

if($isfilter){

return $this->filter_string($this->postdata[$key]);

}else{

return $this->postdata[$key];

}

}

//获取Request传递过来的字符串变量

public function request_string($key,$isfilter=true){

if(!isset($this->requestdata[$key])){

return false;

}

if($isfilter){

return $this->filter_string($this->requestdata[$key]);

}else{

return $this->requestdata[$key];

}

}

//获取Cookie传递过来的字符串变量

public function cookie_string($key,$isfilter=true){

if(!isset($this->cookiedata[$key])){

return false;

}

if($isfilter){

return $this->filter_string($this->cookiedata[$key]);

}else{

return $this->cookiedata[$key];

}

}

//格式化数据

private function format_data($data){

$result = array();

if(!is_array($data)){

$data = array();

}

/*

*list()表示用数组的数值给变量赋值。只用于数字索引的数组，

*默认从0位开始，按顺序下去

*each()

*/

while(list($key,$value) = each($data)){//不太明白

//处理checkbox之类的数据

if(is_array($value)){

$result[$key]=$value;

}else{//普通数据

$result[$key] = trim($value);

//删除字符串两端空白及其它预定义字符

}

}

}

//转化数字

private function to_num($num){

if(is_numeric($num)){

return intval($num);//将变量转为整数

}else{

return false;

}

}

//过换过滤字符串

private function filter_string($data){

if($data===null){

return false;

}

if(is_array($data)){

foreach($data as $k=>$v){

$data[$k] = htmlspecialchars($v,ENT_QUOTES);

//把一些预定义字符转化为html实体

}

return $data;

}else{//普通字符串

return htmlspecialchars($data,ENT_QUOTES);

}

}

}

?>