Released 0.3.0 (see release-page)

README.md

@@ -62,6 +62,10 @@ Even if `id.prefix` defaults to `false` I encourage you to set it to something l
 
 #### Default of `id.rules`
 
+You can either pass a regular expression as the replacement or a callback-function. They will be used with `preg_replace_callback` or `preg_replace`, respectively.
+
+
+
 ```php
 [
   // characters to replace with an hyphen
@@ -75,6 +79,8 @@ Even if `id.prefix` defaults to `false` I encourage you to set it to something l
   // remove trailing hyphens and squash multiple occurences
   '/-+$/' => '',
   '/-{2,}/' => '-',
+  // convert everything to lowercase (using a callback-function)
+  '/([A-Z]+)/' => function($x) { return strtolower($x[1]); }
 ]
 ```
 

anchor-headings.php

@@ -6,7 +6,7 @@
 *
 * @package   Kirby CMS
 * @author    Dennis Kerzig <hi@wottpal.com>
-* @version   0.2.0
+* @version   0.3.0
 *
 */
 
@@ -33,6 +33,7 @@ function headingAnchors($field)
       '/[^A-Za-z0-9\-]/' => '',
       '/-+$/' => '',
       '/-{2,}/' => '-',
+      '/([A-Z]+)/' => function($x) { return strtolower($x[1]); }
     ]),
     'markup' => c::get('anchorheadings.markup', "
     <a href='#{id}'>{enum}.</a> {heading}

helpers.php

@@ -10,7 +10,12 @@ function buildID($options, $enum, $text) {
   if ($options['id_prepend_enum']) $id = $enum . $options['enum_seperator'] . $id;
 
   foreach($options['id_rules'] as $pattern => $replacement) {
-    $id = preg_replace($pattern, $replacement, $id);
+    if (is_callable($replacement)) {
+      $id = preg_replace_callback($pattern, $replacement, $id);
+    } else {
+      $id = preg_replace($pattern, $replacement, $id);
+    }
+
   }
 
   if ($options['id_prefix']) $id = $options['id_prefix'] . $id;

package.json

@@ -2,7 +2,7 @@
   "name": "anchor-headings",
   "description": "A kirby field-method which enumerates heading-elements, generates IDs for anchor-links and inserts custom markup based on your needs.",
   "author": "Dennis Kerzig <hi@wottpal.com> (https://wottpal.com)",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "type": "kirby-plugin",
   "license": "MIT"
 }