Fatal error when importing namespaced class

[DanielWahl]

Hi, I can't use the StarterSite (1.x) with namespaces, to extend or use other classes.

I'm trying to create a new object from my class Backend (to enqueue wp-styles, etc), but after creating a new instance, I'm getting the "There has been a critical error on this website"-error.

use themename\Backend;
class StarterSite extends Timber\Site {
    private $backend;
    public function __construct() {
        ...
        $this->backend = new Backend();
    }
}

causes the error.

Even trying to move the StarterSite class to a new file (f.e. src/StartSite.php) and creating the instance in functions.php breaks everything.

[szepeviktor]

Hello!

Cannot use "use" and namespaces

Please change the title to Fatal error when importing namespaced class

1. Is this v1 or v2?
2. Is the above code in /functions.php ?
3. Does that file have a namespace ...; statement in it?
4. What is the error message? Try running your theme with WP-CLI: https://github.com/szepeviktor/wordpress-plugin-construction/blob/master/wp-cli-run-frontend.php

[DanielWahl]

1. I use v1 / master-branch
2. Yes, the above code is in /functions.php and I cannot get it working in another file
3. Currently no namespace. Typing namespace themename; already breaks the page.

4. When I use the StarterSite-class in a new file and call the class in functions.php with new \crla\StarterSite(); I get the following errorPHP Fatal error: Uncaught Error: Class 'crla\StarterSite' not found in ~/wp-content/themes/crla-theme-master/functions.php:65. After require("src/StarterSite.php") and use clra/StarterSite, I don't get any error running wp-cli-run-frontend, but the page is still broken. PhpStorm finds every Class from the right directory (Timber from /vender/timber/timberlib/Timber.php and StarterSite from src/Startersite.php.

When I change the namespace of functions.php, declare Timber as use \Timber\Timber;, I don't get any error running wp-cli-run-frontend, but the page is still broken.

[szepeviktor]

Please try this.

functions.php

// No namespace!

use crla\StarterSite;

require __DIR__ . '/src/StarterSite.php'; // or Composer's autoloader

new StarterSite();

src/StarterSite.php

namespace crla;

use Timber\Site as TimberSite;

class StarterSite extends TimberSite {

[DanielWahl]

No error, only a warning (Warning: Some code is trying to do a URL redirect.) running the wp-cli, but the page remains broken.

I tried cloning a completely new Starter-Theme v1 and only changing the functions.php by copy&pasting the StarterSite-class into a new file and configuring as above. Still the same, only a warning and page broken.

[szepeviktor]

Warning: Some code is trying to do a URL redirect.

You may need to check --url option to make sure it is a canonical URL.

Doesn't new WordPress versions display the actual error when running through a webserver? Try setting WP_DEBUG to true.

[DanielWahl]

When I leave the StartSite-class inside functions.php and the page is working, I get the exact same warning running wp-cli.

[szepeviktor]

The --url option may specify a non-canonical URL and WordPress does a redirect to the canonical one.

[DanielWahl]

wp --url="http://wp.crla.danielwahl.lu/" eval-file wp-cli-run-frontend.php

Warning: Some code is trying to do a URL redirect. Backtrace:
#0  WP_CLI\Utils\wp_redirect_handler(https://wp.crla.danielwahl.lu/) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/class-wp-hook.php:294]
#1  WP_Hook->apply_filters(https://wp.crla.danielwahl.lu/, Array ([0] => https://wp.crla.danielwahl.lu/,[1] => 301)) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/plugin.php:212]
#2  apply_filters(wp_redirect, https://wp.crla.danielwahl.lu/, 301) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/pluggable.php:1290]
#3  wp_redirect(https://wp.crla.danielwahl.lu/, 301) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/canonical.php:799]
#4  redirect_canonical(http://wp.crla.danielwahl.lu/) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/class-wp-hook.php:292]
#5  WP_Hook->apply_filters(, Array ([0] => )) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/class-wp-hook.php:316]
#6  WP_Hook->do_action(Array ([0] => )) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/plugin.php:484]
#7  do_action(template_redirect) called at [/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/template-loader.php:13]
#8  require_once(/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-includes/template-loader.php) called at [phar:///usr/local/bin/wp/vendor/wp-cli/eval-command/src/EvalFile_Command.php(76) : eval()'d code:20]
#9  eval() called at [phar:///usr/local/bin/wp/vendor/wp-cli/eval-command/src/EvalFile_Command.php:76]
#10 EvalFile_Command::execute_eval(/var/www/vhosts/danielwahl.lu/wp.crla.danielwahl.lu/wp-cli-run-frontend.php, Array ()) called at [phar:///usr/local/bin/wp/vendor/wp-cli/eval-command/src/EvalFile_Command.php:39]
#11 EvalFile_Command->__invoke(Array (), Array ())
#12 call_user_func(Array ([0] => EvalFile_Command Object (),[1] => __invoke), Array ([0] => wp-cli-run-frontend.php), Array ()) called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CommandFactory.php:98]
#13 WP_CLI\Dispatcher\CommandFactory::WP_CLI\Dispatcher\{closure}(Array ([0] => wp-cli-run-frontend.php), Array ())
#14 call_user_func(Closure Object (), Array ([0] => wp-cli-run-frontend.php), Array ()) called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/Subcommand.php:451]
#15 WP_CLI\Dispatcher\Subcommand->invoke(Array ([0] => wp-cli-run-frontend.php), Array (), Array ()) called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:371]
#16 WP_CLI\Runner->run_command(Array ([0] => eval-file,[1] => wp-cli-run-frontend.php), Array ()) called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:394]
#17 WP_CLI\Runner->run_command_and_exit() called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:87]
#18 WP_CLI\Runner->do_early_invoke(before_wp_load) called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:1102]
#19 WP_CLI\Runner->start() called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php:23]
#20 WP_CLI\Bootstrap\LaunchRunner->process(WP_CLI\Bootstrap\BootstrapState Object ([WP_CLI\Bootstrap\BootstrapStatestate] => Array ())) called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php:74]
#21 WP_CLI\bootstrap() called at [phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php:27]
#22 include(phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php) called at [phar:///usr/local/bin/wp/php/boot-phar.php:11]
#23 include(phar:///usr/local/bin/wp/php/boot-phar.php) called at [/usr/local/bin/wp:4]

[szepeviktor]

An s is missing from the protocol: https://wp.crla.danielwahl.lu/ is the canonical URL.

[DanielWahl]

True, the s was missing.

Now the errors also were more clear and I found the issue.

public function add_to_twig( $twig ) {
        $twig->addExtension( new Twig\Extension\StringLoaderExtension() );
        $twig->addFilter( new Twig\TwigFilter( 'myfoo', array( $this, 'myfoo' ) ) );
        return $twig;
    }

new Twig\Extension and new Twig\TwigFilterwere a \ missing in the new class-file. So adding

new \Twig\Extension...
new \Twig\TwigFilter...

Fixed the issue.

@szepeviktor Thanks very much for your help.

[szepeviktor]

You're welcome.

Please consider importing used classes with use Twig\Extension\StringLoaderExtension;