Columns.php

<?php

if (!defined("MEDIAWIKI")) {
    die(
        "This file is an extension to the MediaWiki software and cannot be used standalone.\n"
    );
}

//self executing anonymous function to prevent global scope assumptions
call_user_func(function () {
    $GLOBALS["wgExtensionCredits"]["parserhook"][] = [
        "path" => __FILE__,
        "name" => "Columns",
        "description" => "Very simple parser function for creating div columns",
        "version" => "0.2.0",
        "author" => "@toniher",
        "url" => "https://mediawiki.org/wiki/User:Toniher",
    ];

    $GLOBALS["wgHooks"]["ParserFirstCallInit"][] = "wfColumnsSetup";
});

function wfColumnsSetup(Parser $parser)
{
    $parser->setHook("columns", "wfColumnsRender");
    return true;
}

function wfColumnsRender($text, array $args, Parser $parser, PPFrame $frame)
{
    $output = $parser->recursiveTagParse($text, $frame);
    $columns = 10;
    $format = "wiki";
    $classmain = "columns";
    $class = "column";

    if (isset($args["entries"])) {
        if (is_numeric($args["entries"])) {
            $columns = $args["entries"];
        }
    }

    if (isset($args["format"])) {
        $format = $args["format"];
    }

    if (isset($args["classmain"])) {
        $classmain = $args["classmain"];
    }

    if (isset($args["class"])) {
        $class = $args["class"];
    }

    if ($format == "html") {
        $output = str_replace("<ul>", "", $output);
        $output = str_replace("</ul>", "", $output);
        $output = str_replace("</li>", "", $output);
        $output = str_replace("<p>", "", $output);
        $output = str_replace("</p>", "", $output);
        $listli = explode("<li>", $output);
        $final = "";
        $iter = 0;

        for ($i = 1; $i < count($listli); $i++) {
            if ($iter == 0) {
                $final .= "<div class='" . $class . "'><ul>";
            }

            $final .= "<li>" . $listli[$i] . "</li>";

            $iter++;
            if ($iter == $columns) {
                $final .= "</ul></div>";
                $iter = 0;
            } else {
                if ($i == count($listli) - 1) {
                    $final .= "</ul></div>";
                }
            }
        }

        return '<div class="' . $classmain . '">' . $final . "</div>";
    } else {
        $listli = explode("\*", $output);
        $final = "";
        $iter = 0;

        for ($i = 1; $i < count($listli); $i++) {
            if ($iter == 0) {
                $final .= "<div class='" . $class . "'>\n";
            }

            $final .= "* " . $listli[$i];

            $iter++;
            if ($iter == $columns) {
                $final .= "</div>";
                $iter = 0;
            } else {
                if ($i == count($listli) - 1) {
                    $final .= "</div>";
                }
            }
        }

        return '<div class="' . $classmain . '">' . $final . "</div>";
    }
}