Field::getInputfield() method  
Get the Inputfield module used to collect input for this field.
Usage
// basic usage
$inputfield = $field->getInputfield(Page $page);
// usage with all arguments
$inputfield = $field->getInputfield(Page $page, string $contextStr = '');Arguments
| Name | Type(s) | Description | 
|---|---|---|
$page | Page | Page that the Inputfield is for.  | 
$contextStr (optional) | string | Optional context string to append to the Inputfield's name/id (for repeaters and such).  | 
Return value
Inputfield null
Hooking $field→getInputfield(…)
You can add your own hook events that are executed either before or after the $field->getInputfield(…) method is executed. Examples of both are included below. A good place for hook code such as this is in your /site/ready.php file.
Hooking before
The 'before' hooks are called immediately before each $field->getInputfield(…) method call is executed. This type of hook is especially useful for modifying arguments before they are sent to the method.
$this->addHookBefore('Field::getInputfield', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $Field = $event->object;
  // Get values of arguments sent to hook (and optionally modify them)
  $page = $event->arguments(0);
  $contextStr = $event->arguments(1);
  /* Your code here, perhaps modifying arguments */
  // Populate back arguments (if you have modified them)
  $event->arguments(0, $page);
  $event->arguments(1, $contextStr);
});  Hooking after
The 'after' hooks are called immediately after each $field->getInputfield(…) method call is executed. This type of hook is especially useful for modifying the value that was returned by the method call.
$this->addHookAfter('Field::getInputfield', function(HookEvent $event) {
  // Get the object the event occurred on, if needed
  $Field = $event->object;
  // An 'after' hook can retrieve and/or modify the return value
  $return = $event->return;
  // Get values of arguments sent to hook (if needed)
  $page = $event->arguments(0);
  $contextStr = $event->arguments(1);
  /* Your code here, perhaps modifying the return value */
  // Populate back return value, if you have modified it
  $event->return = $return;
});  API reference based on ProcessWire core version 3.0.252