POC for laravel/framework#31778 bulletproofing incrementOrDecrement

Author: Pantea Marius-ciclistu

src/Models/BaseModel.php

@@ -475,7 +475,11 @@ protected function incrementOrDecrement($column, $amount, $extra, $method): int
 
         $this->{$column} = $this->isClassDeviable($column)
             ? $this->deviateClassCastableAttribute($method, $column, $amount)
-            : $this->{$column} + ($method === 'increment' ? $amount : $amount * -1);
+            : (\extension_loaded('bcmath') ? \bcadd(
+                $s1 = (string)$this->{$column},
+                $s2 = (string)($method === 'increment' ? $amount : $amount * -1),
+                \max(\strlen(\strrchr($s1, '.') ?: ''), \strlen(\strrchr($s2, '.') ?: ''))
+            ) : $this->{$column} + ($method === 'increment' ? $amount : $amount * -1));
 
         $this->forceFill($extra);