enable a payment option when condition is meet

[diptimoy]

Modify the payment module to only be enabled when the IP address is that of the admin.

As a quick fix you can hard code it directly into the module...
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As a better more flexible version
I add a new key to the module to hold a list of admin IP addresses

     $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Admin IP\'s to allow access', 'MODULE_PAYMENT_PHONEORDER_ADMINIP', '123.123.123.123', 'Enter the Admin IP\'s that are allowed to access this module.<br />Separate multiple IP\'s with a comma.<br />No Spaces.', '6', '60', now());"); 

Then I add something like this to the module to disable if not from an admin IP

// disable if NOT accessed from an ADMIN IP address
      if (!in_array($_SESSION['customers_ip_address'], explode(',',MODULE_PAYMENT_PHONEORDER_ADMINIP))) {
        $this->enabled = false;
      } 

nb: You need to edit the code to suit your module, cannot use as it

Thank you very much . want to know will this logic be same if admin has dynamic IP or it has nothing to do with IP being static or dynamic