php输入数据统一类实例

本文实例讲述了php输入数据统一类。分享给大家供大家参考。具体如下：

<?phpclass 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); } }}?>