Custom client function in registrar module

[nasos75]

I want to add some custom functions in my registrar module.

Let's say that I want to create a function that will change the epp code of a domain.

I have this in my module:

function mymod_ClientAreaCustomButtonArray()
{
    return array(
        "Change EPP Code" => "eppcodechange"
    );
}

function mymod_eppcodechange($params)
{
    $domainid = $params['domainid'];
    return array(
        'templatefile' => 'eppcodechange',
        'breadcrumb' => array(
            'clientarea.php?action=domaindetails&domainid='.$domainid.'&modop=custom&a=eppcodechange' => 'EPP Code Change',
        ),
        'vars' => array(
            'domainId' => $domainid
        ),
    );
}

which works fine, and I see the form in client area. The eppcodechange.tpl is like this:

<form class="form-inline" action="clientarea.php">
    <input type="hidden" name="action" value="domaindetails">
    <input type="hidden" name="id" value="{$domainId}">
    <input type="hidden" name="modop" value="custom">
    <input type="hidden" name="a" value="doeppcodechange">
    <div class="form-group mx-sm-3 mb-2">
        <input type="text" class="form-control" id="newEPPCode" placeholder="New EPP Code">
    </div>
    <button type="submit" class="btn btn-primary mb-2">Confirm</button>
</form>

What next? I tried to create a 'mod_doeppcodechange' function in the registrar module, but this was not the case. How do I process the request when the user presses the submit button?

Edited September 11, 2018 by nasos75

[ArashShiri]

Where did you add this codes?