Extra quote escaping at `yii\sphinx\Connection::escapeMatchValue()` fixed

extensions/sphinx/Connection.php

@@ -138,10 +138,11 @@ class Connection extends \yii\db\Connection
      */
     public function escapeMatchValue($str)
     {
-        return addslashes(str_replace(
-            ['/', '"', "'", '(', ')', '|', '-', '!', '@', '~', '&', '^', '$', '=', "\x00", "\n", "\r", "\x1a"],
-            ['\\/', '\\"', "\\'", '\\(', '\\)', '\\|', '\\-', '\\!', '\\@', '\\~', '\\&', '\\^', '\\$', '\\=', "\\x00", "\\n", "\\r", "\\x1a"],
+        $str = str_replace(
+            ['\\', '/', '"', "'", '(', ')', '|', '-', '!', '@', '~', '&', '^', '$', '=', "\x00", "\n", "\r", "\x1a"],
+            ['\\\\', '\\/', '\\"', "\\'", '\\(', '\\)', '\\|', '\\-', '\\!', '\\@', '\\~', '\\&', '\\^', '\\$', '\\=', "\\x00", "\\n", "\\r", "\\x1a"],
             $str
-        ));
+        );
+        return str_replace('\\', '\\\\', $str);
     }
 }

tests/unit/extensions/sphinx/QueryTest.php

@@ -281,7 +281,7 @@ class QueryTest extends SphinxTestCase
 
         $query = new Query;
         $rows = $query->from('yii2_test_article_index')
-            ->match('about"@^')
+            ->match('about\"')
             ->all($connection);
         $this->assertNotEmpty($rows);
     }