NN2024010801/vendor/league/commonmark/docs/1.6/configuration.md

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layout: default

title: Configuration

Configuration

Many aspects of this library's behavior can be tweaked using configuration options.

You can provide an array of configuration options to the CommonMarkConverter when creating it:

$config = [
    'renderer' => [
        'block_separator' => "\n",
        'inner_separator' => "\n",
        'soft_break'      => "\n",
    ],
    'commonmark' => [
        'enable_em' => true,
        'enable_strong' => true,
        'use_asterisk' => true,
        'use_underscore' => true,
        'unordered_list_markers' => ['-', '*', '+'],
    ],
    'html_input' => 'escape',
    'allow_unsafe_links' => false,
    'max_nesting_level' => PHP_INT_MAX,
];

If you're using the basic CommonMarkConverter or GithubFlavoredMarkdown classes, simply pass the configuration array into the constructor:

use League\CommonMark\CommonMarkConverter;
use League\CommonMark\GithubFlavoredMarkdownConverter;

$converter = new CommonMarkConverter($config);
// or
$converter = new GithubFlavoredMarkdownConverter($config);

Otherwise, if you're using MarkdownConverter to customize the extensions in your parser, pass the configuration into the Environment's mergeConfig() method instead:

use League\CommonMark\Environment;
use League\CommonMark\Extension\InlinesOnly\InlinesOnlyExtension;
use League\CommonMark\MarkdownConverter;

$environment = new Environment();

// TODO: Add any/all the extensions you wish; for example:
$environment->addExtension(new InlinesOnlyExtension());

// Here's where we set the configuration array:
$environment->mergeConfig($config);

// Go forth and convert you some Markdown!
$converter = new MarkdownConverter($environment);

Here's a list of currently-supported options:

• renderer - Array of options for rendering HTML
  • block_separator - String to use for separating renderer block elements
  • inner_separator - String to use for separating inner block contents
  • soft_break - String to use for rendering soft breaks
• commonmark - Array of options for configuring CommonMark core functionality:
  • enable_em - Disable <em> parsing by setting to false; enable with true (default: true)
  • enable_strong - Disable <strong> parsing by setting to false; enable with true (default: true)
  • use_asterisk - Disable parsing of * for emphasis by setting to false; enable with true (default: true)
  • use_underscore - Disable parsing of _ for emphasis by setting to false; enable with true (default: true)
  • unordered_list_markers - Array of characters that can be used to indicate a bulleted list (default: ["-", "*", "+"])
• html_input - How to handle HTML input. Set this option to one of the following strings:
  • strip - Strip all HTML (equivalent to 'safe' => true)
  • allow - Allow all HTML input as-is (default value; equivalent to `'safe' => false)
  • escape - Escape all HTML
• allow_unsafe_links - Remove risky link and image URLs by setting this to false (default: true)
• max_nesting_level - The maximum nesting level for blocks (default: PHP_INT_MAX). Setting this to a positive integer can help protect against long parse times and/or segfaults if blocks are too deeply-nested. Added in 0.17.

Additional configuration options are available for some of the available extensions - refer to their individual documentation for more details.

Environment

The configuration is ultimately passed to (and managed via) the Environment. If you're creating your own Environment, simply pass your config array into its constructor instead.

The Environment also exposes two methods for managing the configuration:

• mergeConfig(array $config) - Recursively merge the current configuration with the given options
• getConfig(string $key, $default = null) - Returns the config value. For nested configs, use a /-separate path; for example: renderer/soft_break

Learn more about customizing the Environment