POC for laravel/framework#31778 bulletproofing incrementOrDecrement

Author: Pantea Marius-ciclistu

illuminate/Database/Eloquent/Model.php

@@ -980,15 +980,19 @@ protected function incrementOrDecrement($column, $amount, $extra, $method)
 
         $this->{$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);
 
         if (!$this->isDirty() || $this->fireModelEvent('updating') === false) {
             return 0;
         }
 
-        return tap(
+        return (int)tap(
             $this->setKeysForSaveQuery($this->newQueryWithoutScopes())->{$method}($column, $amount, $extra),
             function () use ($column) {
                 $this->syncChanges();