php - How to load Google SDK in Cakephp 3.9

Solution:

I useGoogle_Client in CakePHP - you shouldn't have to do anything special to use it. If it's installed via composer it's already in Composer's autoloader, you can call it directly.

Ex. Incomposer.json after running./composer.phar require google/apiclient:"^2.7" My require section lists the Google API:

"require": {
    "google/apiclient": "^2.7",
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Make sure you run./composer.phar install if it wasn't already installed durringrequire.

Then in to use the library, I just call it directly, prefixed with\ since it's not namespaced:

public function index()
{
    $client = new \Google_Client();
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If you're curious how this works under the hood - Composer will generate all the information it needs to load classes durringrequire orinstall and sticks these in several files back invendor/composer, such asautoload_namespaces.php, where it should automatically have addedGoogle_ to the list there, ex:

<?php

// autoload_namespaces.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname($vendorDir);

return array(
    // Lots of class prefixes, but eventually:
    'Google_' => array($vendorDir . '/google/apiclient/src'),
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Classes that are namespaced to industry standards like PSR-4 (like all modern PHP libs probably should be!) are probably inautoloader_psr4.php - and so on. It registers it's own autoloader in ClassLoader.php, and sticks a reference to this invendor/autoload.php - which Cake calls essentially on near line 1 ofwebroot/index.php:

require dirname(__DIR__) . '/vendor/autoload.php';
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So in short - you don't need to worry about autoloading again so long as you're working through Composer.

Also - if you're able to use an IDE which helps with autocompletion of class namespaces, like PHPStorm, that might make things easier.

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