Fix a bug in YearMonth::__toString().

brick · Oct 3, 2023 · 0c94b40 · 0c94b40
1 parent 5b6044c
commit 0c94b40
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/YearMonth.php b/src/YearMonth.php
@@ -300,6 +300,8 @@ public function jsonSerialize(): string
      */
     public function __toString(): string
     {
-        return sprintf('%02u-%02u', $this->year, $this->month);
+        $pattern = ($this->year < 0 ? '%05d' : '%04d') . '-%02d';
+
+        return sprintf($pattern, $this->year, $this->month);
     }
 }