in src/FacebookAds/ApiRequest.php [164:174]
public function addFile($filename) {
if (ApiConfig::TYPE_CHECKER_STRICT_MODE && !$this->allow_file_upload) {
throw new \LogicException("This api cannot upload files");
}
$file_key = 'source'.$this->file_counter;
if (file_exists($filename)) {
$this->file_params[$file_key] = $filename;
$this->file_counter++;
}
return $this;
}