This is a log line
[trace-124] This is another log line
this is part of "[trace-124]" still.
[trace-125] final log line.';
$tracePattern = "/\[trace-[0-9]*+\]+\s*<(?:reply|request)>.*?<\/(?:reply|request)>/s";
preg_match_all($tracePattern,$file,$lines);
$lines = $lines[0]; // by defaults, $lines[0] will be an array of the matches, so get that
echo "";print_r($lines);echo "
";