PHP library is not PSR-4 compliant, autoloading doesn't work

[rootpd]

The composer.json currently states this:

  "autoload": {
    "psr-4": {
      "FacebookAds\\": "php/capi-param-builder/src/"
    }
  },

Similarly, the composer.json within php/capi-param-builder/php states this:

  "autoload": {
    "psr-4": {
      "FacebookAds\\": "src/"
    }

The issue is with the classes within the subfolders of the PHP package (model, piiUtil, util) which all use FacebookAds namespace. The PSR-4 autoloading won't match them. Any attempt to use one of these classes ends up with straight PHP error, for example:

Class "FacebookAds\PII_DATA_TYPE" not found

Because of this, our conversion tracking is failing. The Business SDK library is using it exactly this way and fails: https://github.com/facebook/facebook-php-business-sdk/blob/main/src/FacebookAds/Object/ServerSide/UserData.php#L936

Please verify the correctness of autoloading and either update composer.json files, or move files out of their subfolders so they match PSR-4 standard.

Thanks!

[mattmilesi]

Same problem for me.
I temporarily solved adding these lines to the composer.json:

    "classmap": [
        "vendor/facebook/capi-param-builder-php/php/capi-param-builder/src/"
    ],