Demo for demonstrating maximum nesting level in markdown parser.

composer.json

{
    "require": {
        "league/commonmark": "^0.13.2"
    }
}

demo.php

<?php

use League\CommonMark\CommonMarkConverter;


require(__DIR__ . '/vendor/autoload.php');

// in case you have xdebug extension, you do not
// have this check in production, so we set it really high
ini_set('xdebug.max_nesting_level', 100000);

$converter = new CommonMarkConverter();
echo $converter->convertToHtml(str_repeat('> ', 10000));