bug #735 Allow to search blog posts with unicode characters (javiereguiluz)

This PR was merged into the master branch.

Discussion
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Allow to search blog posts with unicode characters

This fixes #734.

The search engine is now more strict because it's case sensitive (if the post title is `Lorém ipsum`, `lorém` and `Lorem` gives no results; you must search for `Lorém`). I'd say it's OK because we're not building a real search engine. Thoughts?

Commits
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0e1c9d3 Allow to search blog posts with unicode characters

Author: javiereguiluz

src/Repository/PostRepository.php

@@ -94,15 +94,15 @@ public function findBySearchQuery(string $rawQuery, int $limit = Post::NUM_ITEMS
      */
     private function sanitizeSearchQuery(string $query): string
     {
-        return preg_replace('/[^[:alnum:] ]/', '', trim(preg_replace('/[[:space:]]+/', ' ', $query)));
+        return trim(preg_replace('/[[:space:]]+/', ' ', $query));
     }
 
     /**
      * Splits the search query into terms and removes the ones which are irrelevant.
      */
     private function extractSearchTerms(string $searchQuery): array
     {
-        $terms = array_unique(explode(' ', mb_strtolower($searchQuery)));
+        $terms = array_unique(explode(' ', $searchQuery));
 
         return array_filter($terms, function ($term) {
             return 2 <= mb_strlen($term);