How do I run a get_posts query on an individual options page for my plugin and send those results to another function to populate the select fields?

I’m building a custom plugin that builds a vcard from custom fields on various post types.

On my options page, generated by CMB2, loaded on cmb2_admin_init, I have various select fields that show meta_keys I’ve found from running a query against all post types. I am seeing a huge number in queries naturally as the entries grow inside each post type. Therefore, I only want to run that query when on the specific admin options page. That is the only time I need that query.

I have been trying to use the ‘load-{options-page.php}’ action hook which works fine, but I don’t understand how to run that query and then get the results inside the function firing on cmb2_admin_init. They are both inside a class so maybe I can pass a variable? But ti always seems to re-run the query because the variable gets assigned inside the function firing on cmb2_admin_init.

I can run this method on ‘load-[name-of-optins-page.php}’

/**  * Convert to array for CMB2 field type  * @since  0.1.0  */ public function get_meta_keys_array() {     $  options = array();     // Get keys from a WP_Query     $  fields = $  this->get_meta_keys();     if( $  fields ) {         // Builds simple array to populate my select fields         foreach( $  fields as $  field => $  key ) {             $  options[$  key] = $  key;         }     }      return apply_filters( 'vcard_get_meta_keys_array_output', $  options ); } 

and then this function for the field display on ‘cmb2_admin_init’

/**  * Registers options page menu item and form.  *  * @since    1.9.0  */ public function register_options_metabox() {      // This is where I am running into trouble.     $  meta_keys = $  this->get_meta_keys_array();        $  cmb_options = new_cmb2_box( array(         'id'           => 'vcard_generator_metabox',         'title'        => esc_html__( 'vCard Generator Settings', $  this->plugin_name ),         'object_types' => array( 'options-page' )           $  cmb_options->add_field( array(             'name'             => esc_html__($  person['name'], $  this->plugin_name),             'id'               => 'vcard_generator_metabox' . $  person['id'],             'type'             => 'select',             'show_option_none' => true,             'default'          => 'custom',             'options'          => $  meta_keys // This is where the meta_keys are populated         ) );  } 

Note that these functions are truncated and will not work with copy/paste