Output FontAwesome icon instead of field value when using WP Job Manager Field Editor

functions.php

<?php
// ^ there should only be one of these at the top of your child theme's functions.php file

// Syntax for filter is field_editor_output_as_value_METAKEY (replacing METAKEY with the actual meta key)
// MAKE SURE YOU REPLACE "METAKEY" below to match the meta key of the field you want to use this for!
add_filter( 'field_editor_output_as_value_METAKEY', 'smyles_output_font_awesome_icon_for_value', 10, 4 );

function smyles_output_font_awesome_icon_for_value( $field_value, $meta_key, $listing_id, $args ){

	if( empty( $field_value ) || is_array( $field_value ) ){
		return $field_value;
	}
	
	$field_value = esc_attr( $field_value );

	// This will output the HTML below, using the value from the field to determine the icon to use,
	// just make sure that it matches exactly what fontawesome expects it to be
	return "<i class=\"fab fa-{$field_value}\"></i>";
}