Register custom fonts into the Customizer and Page Builder interfaces in Beaver Builder

bb-custom-fonts.php

<?php

/**
 * Customizer Custom Fonts
 * 
 * Add fonts to the BB Theme Customizer and BB Page Builder
 * Fonts will be listed under "System" fonts in the drop downs
 *
 * Solution originally found here:
 * https://www.warpconduit.net/2016/02/15/adding-custom-fonts-to-the-beaver-builder-child-theme-customizer/
 */

add_action( 'init', 'customize_font_list' );
function customize_font_list(){
 
    $custom_fonts = array(
        // Enter the font name as you would in CSS
        'franklin-gothic-urw' => array(
            // Fall back fonts
            'fallback' => 'Arial, sans-serif',
            // Available weights
            'weights' => array('100','400','500','600','800')
        ),
    );
    
    // Nothing to change below here
    foreach($custom_fonts as $name => $settings){
        // Add to Theme Customizer
        if(class_exists('FLFontFamilies') && isset(FLFontFamilies::$system)){
            FLFontFamilies::$system[$name] = $settings;
        }
 
        // Add to Page Builder
        if(class_exists('FLBuilderFontFamilies') && isset(FLBuilderFontFamilies::$system)){
            FLBuilderFontFamilies::$system[$name] = $settings;
        }
    }
}