Facebook Instant Articles PHP SDK debug line - php

Question

I'm trying to transform my html page to Facebook Instant Articles format.
I keep getting on the screen
"DEBUG - =========================== DEBUG -"
When Im calling "$transformer->transformString" or "
$transformer->transform( $header, $document );"
Why that? I don't echo anything.
(This isn't wordpress site)
$header =
Header::create()
->withPublishTime(
Time::create( Time::PUBLISHED )->withDatetime(
\DateTime::createFromFormat(
'j-M-Y G:i:s',
date('j-M-Y G:i:s', strtotime($published_date))
))
)
->withModifyTime(
Time::create( Time::MODIFIED )->withDatetime(
\DateTime::createFromFormat(
'j-M-Y G:i:s',
date('j-M-Y G:i:s', strtotime($last_modified_date))
))
);
// Loads the rules configuration file
$rules_file_content = file_get_contents("rules-configuration.json", true);
// Load html content from a file.
//$content = file_get_contents("sample-html.html", true);
$content = get_the_content();
// Create a transformer object and load the rules
$transformer = new Transformer();
$transformer->loadRules($rules_file_content);
$document = new DOMDocument();
libxml_use_internal_errors(true);
$document->loadHTML( '<?xml encoding="' . $charset . '" ?><h1>' . $title . '</h1>' );
libxml_use_internal_errors(false);
$transformer->transform( $header, $document );
if($subtitle) {
$header->withSubTitle ($subtitle);
}
if ( $kicker ) {
$header->withKicker( $kicker );
}
define( 'IA_PLUGIN_VERSION', '4.0.5' );
$instant_article =
InstantArticle::create()
->withCanonicalUrl( $cannonical_link )
->withHeader( $header )
->addMetaProperty( 'op:generator:application', 'facebook-instant-articles' )
->addMetaProperty( 'op:generator:application:version', IA_PLUGIN_VERSION );
$instant_article->withStyle( 'default' );
$transformer->transformString( $instant_article, $content, $charset );
// Instantiate an API client
$client = Client::create(
$APP_ID,
$APP_SECRET,
$ACCESS_TOKEN,
$PAGE_ID,
$is_development
);
// Import the article
try {
$client->importArticle($instant_article, $is_published);
} catch (Exception $e) {
echo 'Could not import the article: '.$e->getMessage();
}

Answer 1

Add these lines :)
\Logger::configure(
[
'rootLogger' => [
'appenders' => ['facebook-instantarticles-traverser']
],
'appenders' => [
'facebook-instantarticles-traverser' => [
'class' => 'LoggerAppenderConsole',
'threshold' => 'INFO',
'layout' => [
'class' => 'LoggerLayoutSimple'
]
]
]
]);
Source: https://github.com/facebook/facebook-instant-articles-sdk-extensions-in-php/blob/master/examples/quiet_logger.php