recover the old README

README.md

@@ -1,3 +1,18 @@
-[![Build Status](https://drone.xrg.io/api/badges/code/xrg.es/status.svg)](https://drone.xrg.io/code/xrg.es)
+[![Build Status](https://ci.sergio.am/api/badges/code/xrg.es/status.svg)](https://ci.sergio.am/code/xrg.es)
 
 For more info: `cd docker`
+
+# [PHP Regular Expressions tester](http://xrg.es)
+
+Source code, ofc.
+
+## Thanks to
+
+- Sergio López [@slopezbustos](http://twitter.com/slopezbustos)
+- Jordi Rivero [@jrivero](http://twitter.com/jrivero)
+- Jorge Massanet [@Percewall](http://twitter.com/Percewall)
+- DigitalVirgo I+D team&co-workers <https://www.digitalvirgo.com>
+
+## Copyright and license
+
+Copyright 2014+ Sergio Álvarez [the MIT license](LICENSE).

backend/src/Entity/PregResponse.php

@@ -18,7 +18,10 @@ class PregResponse
         public readonly ?string $returnValue,
     ) {
         if (preg_last_error() !== PREG_NO_ERROR) {
-            throw new Exception('preg_last_error() = '. preg_last_error_msg());
+            $error = error_get_last();
+            $detail = preg_last_error() === PREG_INTERNAL_ERROR && !is_null($error) ? (': ' . $error['message']) : '';
+
+            throw new Exception('preg_last_error() = ' . preg_last_error_msg() . $detail);
         }
     }
 }