GW Formula in Field Description

gw-formula-in-field-descriptions.php

<?php
/**
 * Plugin Name:  GW Formula in Field Description
 * Plugin URI:   https://gravitywiz.com/
 * Description:  Displays the configured formula as a code block in the field description for all calculation fields.
 * Author:       Gravity Wiz
 * Version:      0.2
 * Author URI:   https://gravitywiz.com
 */

add_filter( 'gform_pre_render', 'gw_formula_in_description', 10, 1 );

function gw_formula_in_description( $form ) {
	foreach ( $form['fields'] as &$field ) {
		$formula = gw_get_field_formula( $field );
		if ( ! $formula ) {
			continue;
		}

		$code_block = '<pre style="background:#f4f4f4;padding:.75em 1em;border-radius:4px;overflow-x:auto;font-size:.875em;line-height:1.5;margin:0 0 .5em;"><code>' . esc_html( $formula ) . '</code></pre>';

		$field->description = $code_block . $field->description;
	}

	return $form;
}

function gw_get_field_formula( $field ) {
	// GF calculated Number fields
	if ( ! empty( $field->calculationFormula ) ) {
		return $field->calculationFormula;
	}

	// GP Formula perk
	if ( ! empty( $field->formula ) ) {
		return $field->formula;
	}

	return null;
}