PHP, regexp and parsing game logs

Question

INFO_MAP name:"mapname" version:"1.2.3"
INFO_SETTINGS mode:"Mode_Normal" options:"Option_None"
PLAYER_CONNECT player:0 name:"testname" id:1231231 psr:1000.00
PLAYER_TEAM_CHANGE player:0 team:2
ITEM_PURCHASE time:0 x:13906 y:13485 z:110 player:2 team:2 item:"Item_ItemName" cost:250
ABILITY_UPGRADE time:0 x:13906 y:13485 z:110 player:2 team:2 name:"Ability_Example1" level:1 slot:2
ITEM_PURCHASE time:0 x:13869 y:13740 z:110 player:1 team:2 item:"Item_AnotherItem" cost:100
PLAYER_CHAT player:3 target:"team" msg:"Test Message with Spaces"

I have this style gamelogs which I have to parse via PHP. Which is the most efficient way to get something useful out of these, current strstr+explodes system is really terrible, coded by prior developer(s). I am thinking of regexp but unable to get anything to work.

kgoedtel · Accepted Answer · 2011-12-15 04:25:22Z

1

A regex like this should work:

^([^\s]+)(\s+([^:]+):("[^"]+"|[^\s]+))+

Changed a bit for PHP (works for me with PHP version 5.1.6):

<?php
$pattern = '/([^\s]+)?(\s+([^:]+):("[^"]+"|[^\s]+))/';
$file_handle = fopen("logfile", "r");
while (!feof($file_handle)) {
   $line = fgets($file_handle);
   preg_match_all($pattern, $line, $matches);
   print_r($matches);
}
fclose($file_handle);
?>

edited Dec 15, 2011 at 4:25

answered Dec 14, 2011 at 17:31

kgoedtel

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2 Comments

user1097445 Over a year ago

It only grabs the mode + last arg/val combo.

kgoedtel Over a year ago

I suppose in PHP you will have to use a preg_match_all and use this regex: ([^\s]+)?(\s+([^:]+):("[^"]+"|[^\s]+))

Wesley van Opdorp · Accepted Answer · 2011-12-14 09:28:36Z

0

I would work trough the log line by line, getting the first action using substr and then process the rest using a function using explode or a preg_match_all. If this is exactly what the other programmers did, I think they did a good job.

Perhaps I wouldn't use regular expression at all, as it's inefficient when you have really large logfiles.

answered Dec 14, 2011 at 9:28

Wesley van Opdorp

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2 Comments

user1097445 Over a year ago

if(strstr($log_line, 'PLAYER_CONNECT')) { $line = explode(" ", $log_line); $id = explode(":", $line[1]); $name = explode(":", $line[2]);

user1097445 Over a year ago

Problem with explode(" ", $line) is that PLAYER_CHAT player:3 target:"team" msg:"Test Message with Spaces" <-- msg: part explodes too many times

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