ElggLogFormatter.php

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<?php

namespace Elgg\Logger;

use Monolog\Formatter\LineFormatter;

class ElggLogFormatter extends LineFormatter {

    public function format(array $record) {

        $context = elgg_extract('context', $record, []);
        $exception = elgg_extract('exception', $context);

        if ($exception instanceof \Throwable) {
            $timestamp = isset($exception->timestamp) ? (int) $exception->timestamp : time();

            $dt = new \DateTime();
            $dt->setTimestamp($timestamp);
            $record['datetime'] = $dt;

            $eol = PHP_EOL;
            $message = "Exception at time {$timestamp}:{$eol}{$exception}{$eol}";
            $record['message'] = preg_replace('~\R~u', $eol, $message);

            if ($exception instanceof \DatabaseException) {
                $record['context']['sql'] = $exception->getQuery();
                $record['context']['params'] = $exception->getParameters();
            }
        }

        return parent::format($record);
    }
}