Drupal have proper UI to create nodes but programmer should know to create a node programmatically, It might need in a custom module or any scripts. The following code would help to create node with the image field in drupal 8,
use \Drupal\node\Entity\Node; use \Drupal\file\Entity\File; //Save Image in local from remote data. $data = file_get_contents("path/data-folder/sample.png"); $file = file_save_data($data, "public://sample.png", FILE_EXISTS_REPLACE); // Create node object and save it. $node = Node::create([ 'type' => 'article', 'title' => 'Sample Node', 'field_image' => [ 'target_id' => $file->id(), 'alt' => 'Sample', 'title' => 'Sample File' ], ]); $node->save();
For your information : Replace all node_save($node) calls with $node->save(), the same for node_delete(). Remove node_delete_multiple($ids) with entity_delete_multiple('node', $ids). Replace comment references with \Drupal\Core\Entity::save() and so on. For more information check here