Create a node object and save it (Drupal 7)

create_node.php

<?php
$node = new stdClass();
$node->type = 'content_type';
$node->title = 'Node Title';

// Set the language.
$node->language = LANGUAGE_NONE;

// Custom field.
$node->field_custom[$node->$language][0]['value'] = 'Custom field data';

// Prepare and save the node.
node_object_prepare($node);
$node = node_submit($node);
$node->revision = TRUE;
node_save($node);