(Notion.so) Notion API Integration (PHP) - A simple snippet which tells you, how to add a new page to a Notion database with PHP using Curl and their public API. You need a secret token and the ID of a "Shared" database. In the example below the database needs to have a text property called "Description" and the default "Name" property.

notion.php

<?php

  // Options
  $secret_token = 'YOUR_SECRET_TOKEN';
  $database_id = 'YOUR_DATABASE_ID';
  $notion_version = '2021-08-16';

  // Post url
  $post_url = 'https://api.notion.com/v1/pages';

  // Post fields
  $post_fields = [
    'parent'     => [ 'database_id' => $database_id, ],
    'properties' => [
      'Name' => [
        'title' => [
          [
            'text' => [
              'content' => 'The page name',
            ],
          ],
        ],
      ],
      'Description'    => [
        'rich_text' => [
          [
            'text' => [
              'content' => 'A dark green leafy vegetable',
            ],
          ],
        ],
      ],
    ],
  ];


  // Init curl
  $ch = curl_init();

  // Set curl options
  curl_setopt_array( $ch, [
    CURLOPT_URL            => $post_url,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING       => '',
    CURLOPT_MAXREDIRS      => 10,
    CURLOPT_TIMEOUT        => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_HTTP_VERSION   => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST  => 'POST',
    CURLOPT_POSTFIELDS     => json_encode($post_fields),
    CURLOPT_HTTPHEADER     => [
      'Content-Type: application/json',
      "Authorization: Bearer {$secret_token}",
      "Notion-Version: {$notion_version}",
    ],
  ] );

  // Get response
  $response = curl_exec( $ch );

  // Close curl
  curl_close( $ch );

  echo $response;

?>