What are some common challenges in implementing a BBCode parser for PHP-based CMS systems?

One common challenge in implementing a BBCode parser for PHP-based CMS systems is properly handling nested BBCode tags. This can be solved by using a recursive function to parse the BBCode content and replace the tags accordingly. 

function parseBBCode($content) {
    $bbcodes = array(
        '/\[b\](.*?)\[\/b\]/i' => '<strong>$1</strong>',
        '/\[i\](.*?)\[\/i\]/i' => '<em>$1</em>',
        '/\[url\](.*?)\[\/url\]/i' => '<a href="$1">$1</a>'
    );

    foreach ($bbcodes as $bbcode => $html) {
        $content = preg_replace_callback($bbcode, function($matches) use ($html) {
            return str_replace('$1', $matches[1], $html);
        }, $content);
    }

    return $content;
}

$bbcode_content = "[b]Bold text[/b] and [i]italic text[/i]. Visit our website [url]https://example.com[/url].";
echo parseBBCode($bbcode_content);

Keywords

BBCode parser PHP CMS challenges

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