Poor quality, hacked together code I wrote a long time ago, for someone that wants to see how whitelist.mcf.li works.

banlists_model.php

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

class Banlists_model extends CI_Model
{

    function __construct()
    {
        parent::__construct();
    }

    /*
     * pass: username
     * return: bancount, bans, score = 0
     */

    function mcbanscom($username)
    {
        $apikey = "HIDDEN";
        $url = "http://api.mcbans.com/v2/$apikey";
        $lookup = array("player" => $username, "admin" => "citricsquid", "exec" => "playerLookup");

        $api_lookup = curl_init();
        curl_setopt($api_lookup, CURLOPT_USERAGENT, "whitelist.mcf.li -- citricsquid");
        curl_setopt($api_lookup, CURLOPT_URL, $url);
        curl_setopt($api_lookup, CURLOPT_POST, 1);
        curl_setopt($api_lookup, CURLOPT_POSTFIELDS, $lookup);
        curl_setopt($api_lookup, CURLOPT_RETURNTRANSFER, TRUE);
        $api_return = curl_exec($api_lookup);

        if(!$api_return)
            return array("bancount" => false, "banlist" => false, "score" => false, "status" => "0", "output" => "Unknown Result");

        $api_response = json_decode($api_return, true);

        $banlist = array_merge($api_response["global"], $api_response["local"]);

        $status = ($api_response["total"] > 0) ? 2 : 1;

        $output = ($api_response["total"] > 0) ? $api_response["total"]." bans :(" : "No bans found";

        return array("bancount" => $api_response["total"], "banlist" => $banlist, "score" => $api_response["reputation"], "status" => $status,"output" => $output);
    }

    function mcbouncercom($username)
    {
        $apikey = "HIDDEN";
        $url = "http://www.mcbouncer.com/api/getBans/$apikey/$username";

        $api_lookup = curl_init();
        curl_setopt($api_lookup, CURLOPT_USERAGENT, "whitelist.mcf.li -- citricsquid");
        curl_setopt($api_lookup, CURLOPT_URL, $url);
        curl_setopt($api_lookup, CURLOPT_RETURNTRANSFER, TRUE);
        $api_return = curl_exec($api_lookup);

        if(!$api_return)
            return array("bancount" => false, "banlist" => false, "score" => false, "status" => "0", "output" => "Unknown Result");

        $api_response = json_decode($api_return, true);

        $status = ($api_response["totalcount"] > 0) ? 2 : 1;

        $output = ($api_response["totalcount"] > 0) ? $api_response["totalcount"]." bans :(" : "No bans found";

        return array("bancount" => $api_response["totalcount"], "banlist" => $api_response["data"], "score" => 0,  "status" => $status, "output" => $output);
    }

    function glizerde($username)
    {
        // this one doesn't seem to have a ban list? So I'll, uh, guess based on reputation?
        // If reputation is <0 == bad person???
        // Will have to note this in the description
        $url = "http://www.glizer.de/usrnotes/index.php?data=$username";

        $api_lookup = curl_init();
        curl_setopt($api_lookup, CURLOPT_USERAGENT, "whitelist.mcf.li -- citricsquid");
        curl_setopt($api_lookup, CURLOPT_URL, $url);
        curl_setopt($api_lookup, CURLOPT_RETURNTRANSFER, TRUE);
        $api_return = curl_exec($api_lookup);

        // too many edge cases for me to do this properly
        preg_match('%<tr><td><b>Global Repuation</b>:</td><td>(.*?) \((.*?)\)</td></tr>%sm', $api_return, $reputation);

        if(!$api_return)
            return array("bancount" => false, "banlist" => false, "score" => false, "status" => "0", "output" => "Unknown Result");

        $status = 1;
        $output = "No bans found";
        $score = 0;

        if(isset($reputation[2]))
        {
            $status = ($reputation[2] > 0) ? 1 : 2;
            $output = $reputation[2]." reputation";
            $score = $reputation[2];
        }

        return array("bancount" => false, "banlist" => false, "score" => $score, "status" => $status, "output" => $output);
    }

    function minebanscom($username)
    {
        $url = "http://minebans.com/view_player.html?player_name=$username";

        $api_lookup = curl_init();
        curl_setopt($api_lookup, CURLOPT_USERAGENT, "whitelist.mcf.li -- citricsquid");
        curl_setopt($api_lookup, CURLOPT_URL, $url);
        curl_setopt($api_lookup, CURLOPT_RETURNTRANSFER, TRUE);
        $api_return = curl_exec($api_lookup);
        
        preg_match("%<div class=\"section_head\"><span>(.*?)'s Bans</span></div>%sm", $api_return, $bans);

        if(!$api_return)
            return array("bancount" => false, "banlist" => false, "score" => false, "status" => "0", "output" => "Unknown Result");

        $status = 1;
        $output = "No bans";

        if(isset($bans[1]))
        {
            $status = ($bans[1]) ? 2 : 1;
            $output = ($bans[1]) ? 'Bans found! :(' : 'No bans';
        }

        return array("bancount" => false, "banlist" => false, "score" => false, "status" => $status, "output" => $output);
    }

}