Glenn Von Posadas Glenn Von Posadas - 1 year ago 116
PHP Question

Can't Find PHP Library In My Project

I'm not a web dev (I'm a mobile developer) and trying to figure this out.

  1. I'm using this library:

  2. I got 'composer' installed on my machine by following the documentation on composer's site.

  3. I have installed the library in #1 by using this command: 'php composer.phar require ktamas77/firebase-php dev-master'

  4. In a certain screen or php file in my project, I'm adding this:

    $firebase = new \Firebase\FirebaseLib(DEFAULT_URL, DEFAULT_TOKEN);

and when I run or go to that specific screen, there's an error like this:

Message: Class 'Firebase\FirebaseLib' not found

My question is: Why is that? Why can't this freakin php project find that FirebaseLib? I can verify that I have such file in my project, cause I can open the file from that code above.

The path of that file is this:


Is adding 'require' at the top of my php file required?

I tried adding require but the error goes to that require when adding that.

Lastly, I even modified my composer.json and added "autoload" as was suggested here: How does PHP connection to firebase work?

"description": "The CodeIgniter framework",
"name": "codeigniter/framework",
"type": "project",
"homepage": "",
"license": "MIT",
"support": {
"forum": "",
"wiki": "",
"irc": "irc://",
"source": ""
"require": {
"php": ">=5.2.4",
"ktamas77/firebase-php": "dev-master"
"suggest": {
"paragonie/random_compat": "Provides better randomness in PHP 5.x"
"require-dev": {
"mikey179/vfsStream": "1.1.*"
"autoload": {
"classmap": ["vendor/ktamas77/firebase-php/src/firebaseLib.php"]
"files": ["vendor/ktamas77/firebase-php/src/firebaseLib.php"]


Unfortunately I wasn't able to do this instruction from that SO answer:

Then simply require Composer's Autoloader with require
"vendor/autoload.php"; and new Firebase to autoload the class.


Answer Source

You need to add the autoloader from composer into your base script or some bootstrap file.

Something like:

require "vendor/autoload.php";
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