Online PHP editor | rfc for J5u29

@ 2023-10-25T15:53:27Z

<?php

class WP_REST_Global_Styles_Controller {
    public function update_item() {
        echo "\n" . __METHOD__ . "\n";
        $this->prepare_item_for_database();
    }
    protected function prepare_item_for_database() {
        echo "\n" . __METHOD__ . "\n";
        $this->validate_custom_css();
    }    
  
    private function validate_custom_css() {
        echo __METHOD__ . "()\n";
    }
}

class Gutenberg_REST_Global_Styles_Controller extends WP_REST_Global_Styles_Controller {

    protected function prepare_item_for_database() {
        echo "\n" . __METHOD__ . "\n";
        $this->validate_custom_css();
    }

    /**
     * Copy of the parent's method.
     * The parent's method is private, meaning a child cannot overload or invoke it.
     * But a child class can have a method with the same name and different visibility.
     */
    protected function validate_custom_css() { 
        echo __METHOD__ . "()\n";
    }
}

class Gutenberg_REST_Global_Styles_Controller_X_X extends Gutenberg_REST_Global_Styles_Controller {}

class WP_REST_Global_Styles_Controller_X_X extends WP_REST_Global_Styles_Controller {
    // will cause a fatal error.
    protected function prepare_item_for_database() { // overloads the parent's method.
        echo "\n" . __METHOD__ . "\n";
        $this->validate_custom_css(); // will cause a fatal error, as the parent's method is private to it.
    } 
}

( new Gutenberg_REST_Global_Styles_Controller() )->update_item();
( new Gutenberg_REST_Global_Styles_Controller_X_X() )->update_item();
( new WP_REST_Global_Styles_Controller_X_X() )->update_item();

Output for git.master, git.master_jit, rfc.property-hooks: WP_REST_Global_Styles_Controller::update_item Gutenberg_REST_Global_Styles_Controller::prepare_item_for_database Gutenberg_REST_Global_Styles_Controller::validate_custom_css() WP_REST_Global_Styles_Controller::update_item Gutenberg_REST_Global_Styles_Controller::prepare_item_for_database Gutenberg_REST_Global_Styles_Controller::validate_custom_css() WP_REST_Global_Styles_Controller::update_item WP_REST_Global_Styles_Controller_X_X::prepare_item_for_database Fatal error: Uncaught Error: Call to private method WP_REST_Global_Styles_Controller::validate_custom_css() from scope WP_REST_Global_Styles_Controller_X_X in /in/J5u29:41 Stack trace: #0 /in/J5u29(6): WP_REST_Global_Styles_Controller_X_X->prepare_item_for_database() #1 /in/J5u29(47): WP_REST_Global_Styles_Controller->update_item() #2 {main} thrown in /in/J5u29 on line 41
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
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2018-06-15 Typed Properties v2 - implemented in PHP 7.4
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2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
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