Delete a Silverstripe Page for both STAGE and LIVE

MyExampleDeleteAllForPage.php

<?php


class MyExampleDeleteAllForPage extends Object
{  
  
    private static function delete_page($idOrPage)
    {
        if($idOrPage instanceof SiteTree) {
            $id = $idOrStage->ID;
        }elseif(intval($idOrPage)) {
            $id = $idOrStage;
            //do nothing
        } else {
            user_error('idOrPage parameter can not be parsed: '.print_r($idOrPage, 1));
        }
        $stageRecord = Versioned::get_one_by_stage('SiteTree', 'Stage', "\"SiteTree\".\"ID\" = $id");
        if ($stageRecord) {
            $stageRecord->deleteFromStage('Stage');
        }
        if ($stageRecord) {
            $stageRecord->delete();
        }
        $liveRecord = Versioned::get_one_by_stage('SiteTree', 'Live', "\"SiteTree\".\"ID\" = $id");
        if ($liveRecord) {
            $stageRecord->deleteFromStage('Live');
        }
        if ($liveRecord) {
            $stageRecord->delete();
        }
    }
}