associative arrays from php.net karma system

gistfile1.txt

<?php
$url = 'http://svn.php.net/viewvc/SVNROOT/global_avail?revision=HEAD&view=co';
$file = file_get_contents($url);

$avail_lines = array();
$pattern = '/^avail\|(.*?)\|(.*?)$/sm';

$repos = array();
$users = array();

preg_match_all($pattern, $file, $avail_lines);
foreach($avail_lines[0] as $i => $line){
        $line_users = explode(',', $avail_lines[1][$i]);
        $line_repos = explode(',', $avail_lines[2][$i]);
        foreach($line_repos as $repo){
                if(!isset($repos[$repo])){
                        $repos[$repo] = array();
                }
        }
        foreach($line_users as $user){
                foreach($line_repos as $repo){
                        $repos[$repo][] = $user;
                        $users[$user][] = $repo;
                }
        }
}

var_dump($users);
var_dump($repos);