Check if MB plugin and extension is active

This topic has 4 replies, 2 voices, and was last updated 1 year, 8 months ago by [email protected].

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Posts

August 17, 2022 at 6:25 PM #37547

Participant

Hello,
I use the snippet from here to list the featured image in the backend.
But if the MB Plugin is not active, my website breaks.

So my question is now, how can I check if MB and the needed extensions are active?
I tried this with function_exists:


/* Add Featured Images to Admin Columns 
 * https://docs.metabox.io/extensions/mb-admin-columns/
 * https://support.metabox.io/topic/displaying-featured-image-in-admin-columns/
 */
if ( function_exists( 'mb_admin_column_load' ) ) {
	add_action( 'admin_init', 'prefix_add_custom_columns', 20 );
}
function prefix_add_custom_columns() {
    class Prefix_Custom_Admin_Columns extends \MBAC\Post {
        public function columns( $columns ) {
            $columns  = parent::columns( $columns );
            $position = 'before';
            $target   = 'title';
            $this->add( $columns, 'featured_image', 'Image', $position, $target );
            // Add more if you want
            return $columns;
        }
        public function show( $column, $post_id ) {
            switch ( $column ) {
                case 'featured_image':
                    the_post_thumbnail( [60, 60] );
                    break;
                // More columns
            }
        }
    }
    new Prefix_Custom_Admin_Columns( 'post', array() );
    new Prefix_Custom_Admin_Columns( 'page', array() );
    new Prefix_Custom_Admin_Columns( 'review', array() );
}

But this isn't working.

How to do it right, and where can I find the right functions for the plugin itself and all extensions?

thanks
Jochen

August 18, 2022 at 11:22 AM #37559

Long Nguyen

Moderator

Hi,

Please follow this documentation to check if the Meta Box plugin is activated https://docs.metabox.io/functions/rwmb-meta/#faq

August 18, 2022 at 5:06 PM #37564

[email protected]

Participant

Hello Long,
sorry I am not a programmer. I don't know how to use this correctly.

My site is still crashing after using this

add_action( 'admin_init', 'prefix_add_custom_columns', 20 );
function prefix_add_custom_columns() {
  if ( ! function_exists( 'rwmb_meta' ) ) {
    function rwmb_meta( $key, $args = [], $object_id = null ) {
        return null;
    }
  }
  class Prefix_Custom_Admin_Columns extends \MBAC\Post {
    public function columns( $columns ) {
      $columns  = parent::columns( $columns );
      $position = 'before';
      $target   = 'title';
      $this->add( $columns, 'featured_image', 'Image', $position, $target );
      // Add more if you want
      return $columns;
    }
    public function show( $column, $post_id ) {
      switch ( $column ) {
        case 'featured_image':
          the_post_thumbnail( [60, 60] );
          break;
          // More columns
      }
    }
  }
  new Prefix_Custom_Admin_Columns( 'post', array() );
  new Prefix_Custom_Admin_Columns( 'page', array() );
  new Prefix_Custom_Admin_Columns( 'review', array() );
}

Can you please correct it for me?
Jochen

August 19, 2022 at 12:23 PM #37580

Long Nguyen

Moderator

Hi,

You can check Meta Box is activated before using the hook to register the custom columns.

if ( function_exists( 'rwmb_meta' ) ) {
    add_action( 'admin_init', 'prefix_add_custom_columns', 20 );
}

For other extensions, if you are using the plugin Meta Box AIO, it is so hard to check if it is available.

August 19, 2022 at 5:40 PM #37943

[email protected]

Participant

Thank you Long.

I have added now "mb_admin_column_load" to the if, but it is still crashing if I deactivate AIO.
Is it not easier to check it the two plugins are active?
How can I do that?

if ( function_exists( 'rwmb_meta' ) OR function_exists( 'mb_admin_column_load' ) ) {
	add_action( 'admin_init', 'prefix_add_custom_columns', 20 );
}
function prefix_add_custom_columns() {
	class Prefix_Custom_Admin_Columns extends \MBAC\Post {
		public function columns( $columns ) {
			$columns  = parent::columns( $columns );
			$position = 'before';
			$target   = 'title';
			$this->add( $columns, 'featured_image', 'Image', $position, $target );
			// Add more if you want
			return $columns;
		}
		public function show( $column, $post_id ) {
			switch ( $column ) {
				case 'featured_image':
					the_post_thumbnail( [60, 60] );
					break;
					// More columns
			}
		}
	}
	new Prefix_Custom_Admin_Columns( 'post', array() );
	new Prefix_Custom_Admin_Columns( 'page', array() );
	new Prefix_Custom_Admin_Columns( 'review', array() );
}

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