Autcomplete with Redis

<?php
$redis = new Redis();
$redis->connect("db", 6379);

if(!$redis->exists(":compl")) {
    echo "Loading entries in the Redis DB\n";
    $file = file("female-names.txt");
    foreach($file as $line) {
        $line = trim($line);
        for($i=0 ; $i < strlen($line); $i++) {
            $prefix = substr($line, 0, $i);
            $redis->zAdd(":compl", 0,$prefix);
        }
        $redis->zAdd(":compl", 0, $line . "*");
    }
} else {
    echo "NOT loading entries, there is already a 'compl' key \n";
}

function complete($redis, $prefix, $count) {
    $results = array();
    $rangeLen = 50;
    $start = $redis->zRank(":compl", $prefix);
    if(!$start) {
        return $results;
    }

    while(count($results) != $count) {
        $range = $redis->zRange(":compl", $start, $start+$rangeLen-1);
        $start += $rangeLen;
        if(!$range || count($range) == 0) {
            break;
        }
        foreach($range as $entry) {
            $minLen = min(strlen($entry), strlen($prefix));
            if(substr($entry, 0, $minLen) !=  substr($prefix, 0, $minLen)) {
                $count = count($results);
            }
            if(substr($entry, -1) == "*" && count($results) != $count) {
                $results[] = substr($entry, 0, -1);
            }
        }
    }

    return $results;
}

$results = complete($redis, "marcell", 50);
foreach($results as $res) {
    echo $res . "\n";
}