$re = '/(?<OrigPrefix>.*?)\s+(?<OrigGarbage>.*\[operationlog.LogSender\])\s+(?<OrigLevel>.*?)\s+(?<OrigOperation>.*?)\s+(?<OrigMessage>.*)/';
$str = '00:05:01,734 INFO [ajp-10.92.36.4-8009-187] [operationlog.LogSender] info stateNotificationDeletion eventTime:Mon Mar 23 00:05:02 CET 2015 source:"1.2249.2251.2427.2429.27615.27617.28307.28311" destination:(long)27715 result:null messageId:14865920 changeId:null
';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php