made it easier to extend SluggableBehavior slug generation

fixes #10118

framework/CHANGELOG.md

@@ -52,6 +52,7 @@ Yii Framework 2 Change Log
 - Enh #9901: Default `Cache.SerializerPermissions` configuration option for `HTMLPurifier` is set to `0775` (klimov-paul)
 - Enh #10056: Allowed any callable to be passed to `ActionColumn::$urlCreator` (freezy-sk)
 - Enh #10061: `yii\helpers\BaseInflector::transliterate()` is now public. Introduced different levels of transliteration strictness (silverfire)
+- Enh #10118: Allow easy extension of slug generation in `yii\behaviors\SluggableBehavior` (cebe, hesna)
 - Enh: Added last resort measure for `FileHelper::removeDirectory()` fail to unlink symlinks under Windows (samdark)
 - Chg #9369: `Yii::$app->user->can()` now returns `false` instead of erroring in case `authManager` component is not configured (creocoder)
 - Chg #9411: `DetailView` now automatically sets container tag ID in case it's not specified (samdark)

framework/behaviors/SluggableBehavior.php

@@ -154,7 +154,7 @@ class SluggableBehavior extends AttributeBehavior
                 foreach ($attributes as $attribute) {
                     $slugParts[] = $owner->{$attribute};
                 }
-                $slug = Inflector::slug(implode('-', $slugParts));
+                $slug = $this->generateSlug($slugParts);
             } else {
                 $slug = $owner->{$this->slugAttribute};
             }
@@ -173,6 +173,19 @@ class SluggableBehavior extends AttributeBehavior
         return $slug;
     }
 
+    /**
+     * This method is called by [[getValue]] to generate the slug.
+     * You may override it to customize slug generation.
+     * The default implementation calls [[\yii\helpers\Inflector::slug()]] on the input strings
+     * concatenated by dashes (`-`).
+     * @param array $slugParts an array of strings that should be concatenated and converted to generate the slug value.
+     * @return string the conversion result.
+     */
+    protected function generateSlug($slugParts)
+    {
+        return Inflector::slug(implode('-', $slugParts));
+    }
+
     /**
      * Checks if given slug value is unique.
      * @param string $slug slug value