过滤，就是清除不需要的数据，留下想要的数据。

其调用方法如下，一：

$filter = new \Phalcon\Filter();$filter->sanitize("some(one)@exa\mple.com", "email");得到的结果是："someone@example.com"

　　

另外一种方法是：

直接通过getPost/get获取

//gby(one)ftk\wf@qq.com$email = $this->request->getPost("email", "email");echo $email;//gbyoneftkwf@qq.com//$this->request->getPost("参数名", "email(需要验证的规则)");

　　

 

自定义过滤器：

案一：class IPv4Filter{    public function filter($value)    {        return filter_var($value, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);    }}$filter = new \Phalcon\Filter();//Using an object$filter->add('ipv4', new IPv4Filter());//Sanitize with the "ipv4" filter$filteredIp = $filter->sanitize("127.0.0.1", "ipv4");案二：$filter = new \Phalcon\Filter();//Using an anonymous function$filter->add('md5', function($value) {    return preg_replace('/[^0-9a-f]/', '', $value);});//Sanitize with the "md5" filter$filtered = $filter->sanitize($possibleMd5, "md5");

　　

 

 

内置过滤器类型（Types of Built-in Filters）

The following are the built-in filters provided by this component:

Name	Description
string	Strip tags
email	Remove all characters except letters, digits and !#$%&*+-/=?^_`{|}~@.[].
int	Remove all characters except digits, plus and minus sign.
float	Remove all characters except digits, dot, plus and minus sign.
alphanum	Remove all characters except [a-zA-Z0-9]
striptags	Applies the  function
trim	Applies the  function
lower	Applies the  function
upper	Applies the  function