thinkphp uses import to import a plug-in class, and then instantiates it with + class name. This is feasible locally, but not on the server. The execution method is in the controller in the admin module. Call the test method in functions.php, a common method of the Common module. The test method imports the class and then instantiates it. The result is not found. The test method uses require instead to introduce require_once ('.. /Extensions/...'), the path is correct, the result prompt: "require(): Failed opening required '../Extensions/PHPThumb/phpthumb.class.php' (include_path='.:/usr/local/php/lib/php')"

< /p>