Can I enable show line number for code?

[sajjadintel]

Dear,
Can I enable show line number for code?

[taufik-nurrohman]

Not possible natively, but my extension has an option to capture the code block content from a function parameter, like this:

$parser->code_block_text = function($text) {
    return do_something($text);
};

Example:

function add_line_numbers($text) {
    $a = [];
    foreach (explode("\n", $text) as $k => $v) {
        $a[] = '<span data-i="' . ($k + 1) . '">' . $v . '</span>';
    }
    return implode("\n", $a);
}

$parser = new ParsedownExtraPlugin;
$parser->code_block_text = function($text) {
    return add_line_numbers($text);
};

echo '<style>pre [data-i]:before {content:attr(data-i) \' \'}</style>';
echo $parser->text('some content...');

[aidantwoods]

No plans currently to add this into Parsedown core, so using an extension as mentioned above is the way to go :)