It appears that the ability to conveniently list callback functions by name in rules has been removed in CI4. This was possible in CI3 by adding the callback_ prefix to the name of the function and just listing it along with any rules in the pipe delimited list of rules in a rule string. The CI3 docs are very proud of this feature. The CI4 docs are oblivious to the fact this convenience seems to have been removed.
I vote for the closure rule to almost get back to the convenience of the old 'prefixed function name' method. You can do it like this
$my_rule_list = [ 'my_field' => [fn ($value) => $this->my_callback_function($value)] ]; $my_error_messages = [ 'my_field' => [0 => 'The callback validator returned false.'] ];
You have to use the array method of listing the closure rule rather than the pipe separated string 'rule1|rule2|rule3...' because, of course, that was the CI3 way of listing a callback. That way doesn't seem to be supported any more.
Our community is visited by hundreds of web development professionals every day. Ask your question and get a quick answer for free.
Find the answer in similar questions on our website.
Do you know the answer to this question? Write a quick response to it. With your help, we will make our community stronger.
PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
CodeIgniter is a framework that is known for requiring a minimum amount of customization to get it up and running. This allows those who choose it to work at a good pace. It has been updated many times since its inception in 2006. Now the most recent version is 4.0.3.
Welcome to the Q&A site for web developers. Here you can ask a question about the problem you are facing and get answers from other experts. We have created a user-friendly interface so that you can quickly and free of charge ask a question about a web programming problem. We also invite other experts to join our community and help other members who ask questions. In addition, you can use our search for questions with a solution.
Ask about the real problem you are facing. Describe in detail what you are doing and what you want to achieve.
Our goal is to create a strong community in which everyone will support each other. If you find a question and know the answer to it, help others with your knowledge.