<?php

add_filter('gform_pre_render', 'populate_taxonomy_terms');

function populate_taxonomy_terms($form)
{
	// Specify the form ID and the ID of the select field
	$form_id = 2;
	$field_id = 15;

	// Check if the current form matches the specified form ID
	if ($form['id'] == $form_id) {
		// Retrieve custom taxonomy terms
		$terms = get_terms(array(
			'taxonomy' => 'etiquettes',
			'hide_empty' => false, // Include empty terms
		));

		// Prepare choices array for the select field
		$choices = array();
		foreach ($terms as $term) {
			$choices[] = array(
				'text' => $term->name,
				'value' => $term->term_id,
			);
		}

		// Find the select field by ID
		foreach ($form['fields'] as &$field) {
			if ($field->id == $field_id) {
				// Update choices for the select field
				$field->choices = $choices;
				break;
			}
		}
	}

	return $form;
}