Slugify helpers

README.md

View helper usage:

{a=Aertmann\Acme\ViewHelpers}
<div id="{node.properties.title -> a:slugify()}"></div>

Eel helper usage:

slug = ${String.slugify(q(node).property('title'))}

Settings.yaml

TYPO3:
  TypoScript:
    defaultContext:
      String: 'Aertmann\Acme\Eel\Helper\StringHelper'

SlugifyViewHelper.php

<?php
namespace Aertmann\Acme\ViewHelpers;

/**
 * Slugify view helper to generate dom IDs/url slugs
 */
class SlugifyViewHelper extends \TYPO3\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper {

	/**
	 * Slugifies a value
	 *
	 * @param string $value The value to be processed
	 * @param array $replace The replace array (keys will be replaced with values)
	 * @return string $value
	 */
	public function render($value = '', array $replace = array('æ' => 'ae', 'Æ' => 'ae', 'ø' => 'oe', 'Ø' => 'oe', 'å' => 'aa', 'Å' => 'aa')) {
		$value = $value === '' ? $this->renderChildren() : $value;

		if (empty($replace) === FALSE) {
			$value = strtr($value, $replace);
		}

		// Replace non letter or digits by -
		$value = preg_replace('~[^\\pL\d]+~u', '-', $value);

		// Trim incl. dashes
		$value = trim($value, '-');

		// Transliterate
		if (function_exists('iconv') === TRUE) {
			$value = iconv('utf-8', 'us-ascii//TRANSLIT', $value);
		}

		// Lowercase
		$value = strtolower($value);

		// Remove unwanted characters
		$value = preg_replace('~[^-\w]+~', '', $value);

		return $value;
	}

}

StringHelper.php

<?php
namespace Aertmann\Acme\Eel\Helper;

use TYPO3\Flow\Annotations as Flow;

/**
 * Extends the default string helper for Eel
 *
 * @Flow\Proxy(false)
 */
class StringHelper extends \TYPO3\Eel\Helper\StringHelper {

	/**
	 * Slugifies a value
	 *
	 * @param string $value The value to be processed
	 * @param array $replace The replace array (keys will be replaced with values)
	 * @return string $value
	 */
	public function slugify($value = '', array $replace = array('æ' => 'ae', 'Æ' => 'ae', 'ø' => 'oe', 'Ø' => 'oe', 'å' => 'aa', 'Å' => 'aa')) {
		if (empty($replace) === FALSE) {
			$value = strtr($value, $replace);
		}

		// Replace non letter or digits by -
		$value = preg_replace('~[^\\pL\d]+~u', '-', $value);

		// Trim incl. dashes
		$value = trim($value, '-');

		// Transliterate
		if (function_exists('iconv') === TRUE) {
			$value = iconv('utf-8', 'us-ascii//TRANSLIT', $value);
		}

		// Lowercase
		$value = strtolower($value);

		// Remove unwanted characters
		$value = preg_replace('~[^-\w]+~', '', $value);

		return $value;
	}

}