Dynamically populate Gravity Forms Select field with ACF Select field choices

dynamically-populate-gravity-form-select-acf.php

<?php
/*
 * Dynamically populate Gravity Forms Select field with ACF Select field Choices
 *
 * Add form ID at end of each filter to target a specific form
 *
 * Ref: https://docs.gravityforms.com/dynamically-populating-drop-down-fields/
 *
 */

//Target form with ID 2.
add_filter( 'gform_pre_render_2', 'populate_gf_select_from_acf_select' );
add_filter( 'gform_pre_validation_2', 'populate_gf_select_from_acf_select' );
add_filter( 'gform_pre_submission_filter_2', 'populate_gf_select_from_acf_select' );
add_filter( 'gform_admin_pre_render_2', 'populate_gf_select_from_acf_select' );
function populate_gf_select_from_acf_select( $form ) {
	foreach ( $form['fields'] as &$field ) {

		// Check if field type is a Select and ID is 8.
		if ( $field->type == 'select' && $field->id == 8 ) {

			// ACF select field object - use field key.
			$acf_field = get_field_object( 'field_62261b6cbc90d' );

			// Create blank array.
			$choices = array();

			if ( $acf_field ) {
				// Loop over Select choices and add to $choices array.
				foreach ( $acf_field['choices'] as $value => $label ) {
					$choices[] = array( 'text' => $label, 'value' => $value );
				}
			}

			// (Optional) Set placeholder text for GF dropdown.
			$field->placeholder = 'Select a location';

			// Set choices from array of ACF Select choices.
			$field->choices = $choices;

		}
	}
	return $form;
}