ACF template helper - Checks if at least one field is completed by BO for display or not a block

acf-functions-helper.php

<?php
/**
 * This function checks if at least one field is completed by BO
 *
 * @param array|string $fields  the list of ACF fields to test, an array or a string of text separated by a comma
 * @param mixed $object the post_id of which the value is saved against
 * @param bool $is_sub_field
 *
 * @return bool
 */
function is_one_acf_field_filled( $fields, $object = false, $is_sub_field = false ) {
	if ( empty( $fields ) ) {
		return false;
	}

	if ( is_string( $fields ) ) {
		$fields = explode( ',', $fields );
		$fields = array_map( 'trim', $fields );
		$fields = array_filter( $fields );
	}

	if ( empty( $fields ) ) {
		return false;
	}

	foreach ( $fields as $field ) {
		if ( true === $is_sub_field ) {
			$value = get_sub_field( $field );
		} else {
			$value = get_field( $field, $object );
		}

		if ( ! empty( $value ) ) {
			return true;
		}
	}

	return false;
}

template-sample.php

<?php if ( is_one_acf_field_filled( 'name, mail, phone, fax' ) ) : ?>
    <div class="contact-block">
        <!-- Show only this DIV if ONE of this field is filled on backend -->
		<?php the_field( 'name' ); ?>
		<?php the_field( 'mail' ); ?>
		<?php the_field( 'phone' ); ?>
		<?php the_field( 'fax' ); ?>
    </div>
<?php endif; ?>