hedera-web/rest/core/log.php

<?php

class Log extends Vn\Web\JsonRequest {
	const PARAMS = [
		 'file'
		,'line'
		,'message'
		,'stack'
	];

	function run($db) {			
		$user = isset($_SESSION['user']) ? $_SESSION['user'] : 'guest';
		error_log(sprintf("Javascript: User: %s: %s(%d): %s.\n%s"
			,$user
			,$_REQUEST['file']
			,$_REQUEST['line']
			,$_REQUEST['message']
			,$_REQUEST['stack']
		));
		return TRUE;
	}
}