How to create filters for Jinput?

Question

I have gone through with the JInput Documentation.

We can access the JInput object like this:

JFactory::getApplication()->input;

If we are retrieving more values, it would be useful to store the JInput object in a variable so we don’t need to call JFactory::getApplication() every time we are doing that:

$jinput = JFactory::getApplication()->input;

To retrieve a value from JInput we need to use its get method:

$data = $jinput->get('varname', 'default_value', 'filter');

As you can see, it has 3 parameters:

1. the variable name
2. the default value (defaults to null)
3. the filter name (defaults to cmd)

And here comes my question regarding the 3rd parameter.

How can I make my own filter for Jinput? For example if I have to validate phone numbers or IP address then how can I make my own filter for that?

Answer 1

this is quite simple

In first of it create an custom Jinput class such as class JinputTelephone // what ever you want.

perhaps, have a look in existing inputfilter classes under /libraries/joomla/input

// Modify the getter and filterMethod as you want

/**
 * Gets a value from the input data.
 *
 * @param   string  $name     Name of the value to get.
 * @param   mixed   $default  Default value to return if variable does not exist.
 * @param   string  $filter   Filter to apply to the value.
 *
 * @return  mixed  The filtered input value.
 *
 * @since   11.1
 */
public function get($name, $default = null, $filter = 'cmd')
{
    if('phonyfilter'=== $filter){ 
    // here we ca got with static filter classes like for formvalidation  or 
    }        
    elseif (isset($this->data[$name]))
    {
        return $this->filter->clean($this->data[$name], $filter);
    }

    return $default;
}

// usage

$phoneInput = new JinputTelephone();
$phoneInput->get('anPhoneNumber','0040','phonyfilter');

// with this method you can also use the regular input handling // But you can't use it with JApplication an input

There are many other ways to do that Another solution $data = MyFilter::SanitizeNumber($jinput->get('varname', 'default_value', 'raw'));

does it helps you?

Answer 2

My try,

i see that you have some experience with joomla so i will just put my few cents into it.

1. you need to create system plugin
2. you need to create a method after init or similar.
3. now you need to initiate JLoader if i'm not wrong and add path to libraries a.k.a. /plugins/system/myplugin/libraries/newfilter.php
4. enable plugin and profit ; )

PS. you can create by this way an overrides too joomla core libraries and platform. Such a Curl SSL problem with certs ; )

regards