PHP Facebook Page Post Library

A simple PHP library for posting to Facebook Pages using the Graph API. This package allows you to post text messages and photos to your Facebook page.

Requirements

• PHP >= 8.2
• cURL extension
• JSON extension
• Facebook App with Page access
• Long-lived Page Access Token

Installation

composer require codechap/f
composer require codechap/f @dev

Quick Start

1. Setup

Run the setup script to configure your Facebook page:

php setup.php

This will guide you through:

• Getting an access token from Facebook
• Selecting your Facebook page
• Saving the configuration

2. Post to Facebook

<?php

require 'vendor/autoload.php';

use Codechap\F\F;
use Codechap\F\Msg;

// Initialize Facebook client
$fb = new F();
$fb->set('pageId', 'YOUR_PAGE_ID');
$fb->set('accessToken', 'YOUR_PAGE_ACCESS_TOKEN');

// Create a simple text post
$msg = new Msg();
$msg->set('content', 'Hello Facebook!');

$response = $fb->post($msg);
echo "Posted! ID: " . $response['id'];

Examples

Text Post

$msg = new Msg();
$msg->set('content', 'Hello from PHP!');
$fb->post($msg);

Photo Post

$msg = new Msg();
$msg->set('content', 'Check out this photo!');
$msg->set('image', 'path/to/photo.jpg');
$fb->post($msg);

Multiple Photos

$photo1 = new Msg();
$photo1->set('image', 'photo1.jpg');

$photo2 = new Msg();
$photo2->set('image', 'photo2.jpg');

$photo3 = new Msg();
$photo3->set('content', 'Photo gallery');
$photo3->set('image', 'photo3.jpg');

$fb->post([$photo1, $photo2, $photo3]);

Get Page Info

$info = $fb->me();
echo "Page: " . $info['data']['name'];

Getting Access Token

Method 1: Using Setup Script (Recommended)

php setup.php

Follow the prompts to get your token from Facebook Graph API Explorer.

Method 2: Manual Setup

1. Go to Facebook Graph API Explorer
2. Select your app from the dropdown
3. Click "User or Page" → "Get User Token"
4. Add these permissions:
   • pages_show_list
   • pages_manage_posts
   • pages_read_engagement
   • public_profile
5. Click "Generate Access Token"
6. Grant permissions and select your pages
7. Copy the token

Extend Token Lifetime

To get a long-lived token (60+ days):

1. Go to Access Token Debugger
2. Paste your token
3. Click "Extend Access Token"
4. Use the extended token in your code

Facebook App Credentials

This package is configured to work with an app:

• App ID: YOUR_APP_ID_HERE
• App Secret: YOUR_APP_SECRET_HERE

You can also use your own Facebook app by updating these values in setup.php.

API Reference

F Class

Main class for Facebook operations.

Methods

• set(string $key, string $value) - Set configuration (pageId, accessToken, apiVersion)
• post($content) - Post content to Facebook (accepts Msg or array of Msg)
• me() - Get page information

Msg Class

Message content handler.

Methods

• set(string $key, string $value) - Set content or image path
• get(string $key) - Get content or image path
• hasContent() - Check if message has text
• hasImage() - Check if message has an image

Configuration

After running setup.php, your configuration is saved to .env.local:

FACEBOOK_PAGE_ID=YOUR_PAGE_ID
FACEBOOK_PAGE_NAME="Your Page Name"
FACEBOOK_ACCESS_TOKEN=YOUR_TOKEN
FACEBOOK_APP_ID=YOUR_APP_ID
FACEBOOK_APP_SECRET=YOUR_APP_SECRET_HERE

Error Handling

try {
    $fb->post($msg);
} catch (\RuntimeException $e) {
    // Facebook API errors
    echo "API Error: " . $e->getMessage();
} catch (\Exception $e) {
    // Other errors
    echo "Error: " . $e->getMessage();
}

Image Requirements

• Maximum size: 10MB
• Supported formats: JPEG, PNG, GIF, WEBP
• Minimum dimensions: 200x200 pixels

Rate Limits

Facebook enforces rate limits on API calls. Be mindful of:

• Posting frequency
• Number of API calls per hour
• Batch operations when posting multiple items

Security

• Never commit access tokens to version control
• Use environment variables or .env.local files
• Add .env.local to .gitignore
• Regenerate tokens periodically
• Keep app credentials secure

Troubleshooting

No pages found or Missing pages

• Make sure you're an admin of at least one Facebook page
• Grant all required permissions when generating the token
• Select your pages in the authorization popup
• Note: Pages belonging to different Business Manager accounts or business assets may not all appear together. You can only access pages within the same business context in a single token

Token expired

• Tokens expire after 60 days
• Run setup.php again to get a new token
• Consider implementing automatic token refresh

Permission errors

• Ensure your app has the required permissions
• Regenerate token with all permissions granted
• Check that your page is published and accessible

License

MIT License - see LICENSE file for details.