Sort Repeater By Sub Field Alphabetically | Timber/Twig/WordPress

functions.php

<?php
// Get repeater value
$repeater = get_field('team', [--POST ID--]);

// Obtain sub fields
foreach ($repeater as $key => $row) {
  $the_image[$key] = $row['image'];
	$the_first_name[$key] = $row['first_name'];
	$the_last_name[$key] = $row['last_name'];
}

// Sort the repeater by last name sub field, ascending
array_multisort($the_last_name, SORT_ASC, $repeater);

// Add repeater to context
$context['repeater'] = $repeater;