Fix migration bug under PHP 8.0

system/libraries/Migration.php

@@ -281,19 +281,38 @@ public function version($target_version)
 
 			include_once($file);
 			$class = 'Migration_'.ucfirst(strtolower($this->_get_migration_name(basename($file, '.php'))));
+
+			// Add the following line as part of change to allow compatibility with PHP 8
+                        $instance = new $class;
+
 
 			// Validate the migration file structure
 			if ( ! class_exists($class, FALSE))
 			{
 				$this->_error_string = sprintf($this->lang->line('migration_class_doesnt_exist'), $class);
 				return FALSE;
 			}
-			elseif ( ! is_callable(array($class, $method)))
+
+
+			//elseif ( ! is_callable(array($class, $method)))
+
+			// The following modification is required for PHP 8
+			elseif ( ! is_callable(array($instance, $method)))
+			{
+    				$this->_error_string = sprintf($this->lang->line('migration_missing_'.$method.'_method'), $class);
+    				return FALSE;
+			}
+/** Does not work under PHP 8
+			elseif ( ! in_array($method, array_map('strtolower', get_class_methods($class))))
+
+			
+			
+			
 			{
 				$this->_error_string = sprintf($this->lang->line('migration_missing_'.$method.'_method'), $class);
 				return FALSE;
 			}
-
+*/
 			$pending[$number] = array($class, $method);
 		}