htmlify for stuff like youtube descriptions

htmlify.php

<?php

function htmlify($text)
{
    $html = htmlspecialchars($text);
    $html = " <p> " . preg_replace("@(\r\n|\n|\r){2,}@", " </p> <p> ", $html) . " </p> ";
    $html = str_replace("\n", " <br> ", $html);
    $html = preg_replace('/\s\s+/', ' ', $html);
    $html = preg_replace_callback('/([a-z]+:\/\/)(\S+)/', function ($matches) {
        $matches[2] = preg_replace('@^www\.@i', '', $matches[2]);

        return sprintf(' <a href="%s" target="_blank">%s</a> ', trim($matches[0]), $matches[2],
            $matches[2]);
    }, $html);

    return $html;
}