custom page name

Helloworld.module

<?php


class Helloworld extends WireData implements Module {

	public static function getModuleInfo() {

		return array(

			'title' => 'Hello World',
			'version' => 101,
			'summary' => 'An example module used for demonstration purposes. See the /site/modules/Helloworld.module file for details.',
			'href' => 'http://www.processwire.com',
			'singular' => true,
			'autoload' => true,
			);
	}

	public function init() {

		
		$this->addHookBefore('InputfieldPageName::render', $this, 'hookRender');
	}

	public function hookRender(HookEvent $event) {
		// if process isn't ProcessPageAdd, exit now
		if($this->process != 'ProcessPageAdd') return;

		// if the GET var 'parent_id' isn't the one we want, exit now
		$parent = $this->pages->get($this->input->get->parent_id);
		if($parent->template != "basic-page") return;

		$inputfield = $event->object;

		// if the input already has a populated value, exit now
		if(strlen($inputfield->attr('value'))) return;

		// if we made it here, populate the value attribute
		$inputfield->attr('value', 'the-page-name-you-want');
	}

}