include_once issue

[asiek]

I am trying to include a file located in wp-content/mu-plugins
I placed this line of code inside of my mu-plugins.php file:
include_once( 'metaboxes/meta_box.php' );

Added my custom post type & meta box, but I keep getting these error messages:

_Warning: include_once(/home/domain/public_html/metaboxes/) [function.include-once]: failed to open stream: No such file or directory in /home/domain/public_html/test/wp-content/mu-plugins/metaboxes/meta_box.php on line 3_

_Warning: include_once() [function.include]: Failed opening ‘/home/domain/public_html/metaboxes/’ for inclusion (include_path=’.:/usr/local/php52/pear’) in /home/domain/public_html/test/wp-content/mu-plugins/metaboxes/meta_box.php on line 3_

_Warning: Cannot modify header information – headers already sent by (output started at /home/domain/public_html/test/wp-content/mu-plugins/metaboxes/meta_box.php:3) in /home/domain/public_html/test/wp-content/plugins/woocommerce/classes/class-wc-session-handler.php on line 63_

When I include the file in my functions.php file everything works…
But, how exactly can I include it from my /mu-plugins/mu-plugins.php file/directory?

Please help :/

[chrisburton]

You need to set the correct file path. That’s why you’re getting those errors.

I’m don’t recall WordPress’s structure so it could be something like:

<?php include_once(‘../pluginfile.php’); ?>

or

<?php include_once(‘../../pluginfile.php’); ?>

[asiek]

@chrisburton Hello Chris thanks for your time :)
I just tried out both of those but I still get the error messages :(

[chrisburton]

@Keilowe That’s because it was just an example. Reply with the absolute URL to the file and also the absolute file path where you used include_once and got an error.

Absolute URL’s look like this:

http://localhost/wordpress/wp-content…etc

or

http://localhost/wordpress/wp-content…etc

[asiek]

I used this//

include_once( 'http://domain[.]com/test/wp-content/mu-plugins/metaboxes/meta_box.php' );

But no luck.

[chrisburton]

Ok so the following is the file you want to include:

http://domain[.]com/test/wp-content/mu-plugins/metaboxes/meta_box.php

Now, what is the path to the file where you’re placing the include_once?

Also, I just noticed the HEADER error. Did you change any core files?

[chrisburton]

@traq

It’s not an absolute URL you need

I was trying to figure out where exactly the file was located and how her WordPress was setup.

[asiek]

@chrisburton @traq I found part of the issue
in the file I was trying to include I replaced a line a while ago with this//
include_once $_SERVER['DOCUMENT_ROOT'] . "/metaboxes/";
(Why? I have no idea…)

Replacing that line with the original “define” code did the trick:

define( 'CUSTOM_METABOXES_DIR', get_template_directory_uri() . '/metaboxes' );

Then I used this inside of my must-use.php file:

include_once( 'metaboxes/meta_box.php' );
 

Now it works except my whole point in using must-use.php for my CPT is so I wouldn’t have to register the PT for every single theme I create…
This line:

define( 'CUSTOM_METABOXES_DIR', get_template_directory_uri() . '/metaboxes' );

Gets the directory from my theme’s folder…
But if I delete “metaboxes” the css and javascript gets disabled from my post type edit screen…

How can I define “/metaboxes” from my mu-plugins folder?

I found this post:
[http://youneedfat.com/get-the-mu-plugin-directory-url/](http://youneedfat.com/get-the-mu-plugin-directory-url/ “http://youneedfat.com/get-the-mu-plugin-directory-url/&#8221;)

Which looks to me like a solution…but I wasn’t able to get it to work.
*sigh*

[asiek]

Here is what I tried to use from reading that post//

 add_action('init', 'mu_plugin_urls');
function mu_plugin_urls() {
define( 'MU_PLUGIN_URL', plugins_url( 'mu-plugins' , dirname( __FILE__ ) ) );
define( 'MU_MB_URL', MU_PLUGIN_URL . '/metaboxes' );
define( 'MU_MB_CSS_URL', MU_MB_URL . '/css' );
define( 'MU_MB_IMG_URL', MU_MB_URL . '/images' );
define( 'MU_MB_JS_URL', MU_MB_URL . '/js' ); 
}

[asiek]

@chrisburton @traq FINALLY found the main issue ^.^
I was trying to get a file from wp-content/plugins the whole entire time…
I found [this page](http://codex.wordpress.org/Function_Reference/content_url “http://codex.wordpress.org/Function_Reference/content_url&#8221;), and there ya have it!
content_url() is what I should’ve been using!!!

I used this line to get everything from /metaboxes directory:

define( 'CUSTOM_METABOXES_DIR', content_url() . '/mu-plugins/metaboxes' );

NOW, I can register all CPT and Metaboxes from my must-use file instead of using my functions file…

Thanks for your time guys!

[asiek]

oops I meant I was trying to get the file from my theme’s directory the whole entire time*…

[chrisburton]

So it’s solved?

[asiek]

@chrisburton Yes lol I stated in my last comments that instead of using get_template_directory_uri() I needed to use content_url() .

I am not sure how to mark this post as solved…

[Author]

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