Add verification if is a valid regex

lezhnev74 · Feb 9, 2021 · 56f87af · 56f87af
1 parent 9e40768
commit 56f87af
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/src/Validation/Rules/Library/RuleString.php b/src/Validation/Rules/Library/RuleString.php
@@ -98,9 +98,13 @@ public function min(int $len): void
 
     public function regexp(string $expr): void
     {
-        if (!preg_match($expr, $this->value)) {
-            throw new RuleFailed(sprintf("string does not match regular expression %s", $expr));
-        }
+      if(@preg_match($expr, '') === FALSE) {
+        throw new RuleFailed(sprintf("regexp is not a valid regular expression %s", $expr));
+      }
+
+      if(!preg_match($expr, $this->value)) {
+        throw new RuleFailed(sprintf("string does not match regular expression %s", $expr));
+      }
     }
 
     public function url(): void