Question

Can someone help me out with creating a regex expression in PHP to parse out the different fields within an Akamai access log. The first line below specifies the field names. Thanks!

#Fields: date time cs-ip cs-method cs-uri sc-status sc-bytes time-taken cs(Referer) cs(User-Agent) cs(Cookie) x-custom
2011-08-08  23:59:52    63.555.254.85   GET /somedomain/images/banner_320x50.jpg    200 10801   0   "http://somerefered.com"    "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8G4" "-" "-"

Answer 1

Here is a quick little test program I just wrote:

<?php
// Fields: date time cs-ip cs-method cs-uri sc-status sc-bytes time-taken cs(Referer) cs(User-Agent) cs(Cookie) x-custom
$logLine = '2011-08-08  23:59:52    63.555.254.85   GET /somedomain/images/banner_320x50.jpg    200 10801   0   "http://somerefered.com"    "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8G4" "-" "-"';
$regex = '/^(\d{4}-\d{2}-\d{2})\s+(\d{2}:\d{2}:\d{2})\s+(\d{1,3}(?:\.\d{1,3}){3})\s+([A-Za-z]+)\s+(\S+)\s+(\d{3})\s+(\d+)\s+(\d+)\s+"([^"]*)"\s+"([^"]*)"\s+"([^"]*)"\s+"([^"]*)"$/';

$matches = array();
if (preg_match($regex, $logLine, $matches)) {
    $logParts = array(
        'date' => $matches[1],
        'time' => $matches[2],
        'cs-ip' => $matches[3],
        'cs-method' => $matches[4],
        'cs-uri' => $matches[5],
        'sc-status' => $matches[6],
        'sc-bytes' => $matches[7],
        'time-taken' => $matches[8],
        'cs(Referer)' => $matches[9],
        'cs(User-Agent)' => $matches[10],
        'cs(Cookie)' => $matches[11],
        'x-custom' => $matches[12]
    );
    print_r($logParts);
}
?>

This outputs:

Array
(
    [date] => 2011-08-08
    [time] => 23:59:52
    [cs-ip] => 63.555.254.85
    [cs-method] => GET
    [cs-uri] => /somedomain/images/banner_320x50.jpg
    [sc-status] => 200
    [sc-bytes] => 10801
    [time-taken] => 0
    [cs(Referer)] => http://somerefered.com
    [cs(User-Agent)] => Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8G4
    [cs(Cookie)] => -
    [x-custom] => -
)