public function txtLine($msg, $frame = null, $prefix = null)
{
if (!$frame) {
return "{$prefix}: {$msg}\n";
} else {
return basename($frame['file']) . ' on line ' . $frame['line'] . ', path: ' . dirname($frame['file']) . "\n\n" . ($prefix ? "{$prefix}: " : '') . "{$msg}\n\n";
}
}