Save Craft 3 Entry With PHP

file.php

<?php

      $section = Craft::$app->sections->getSectionByHandle('journalArticles');
      $entryTypes = $section->getEntryTypes();
      $entryType = reset($entryTypes);

      $entry = new Entry([
        'sectionId' => $section->id,
        'typeId' => $entryType->id,
        'fieldLayoutId' => $entryType->fieldLayoutId,
        'authorId' => 1,
        'title' => 'My Entry',
        'slug' => 'my-entry',
        'postDate' => new DateTime(),
      ]);

      $entry->setFieldValues([
        'journalTitle' => 'Hello'
      ]);

      $success = Craft::$app->elements->saveElement($entry);
      
      if(!$success) {
        echo "why";
      }