wesrice

<?php 

	// Get the repeater field
	$repeater = get_field( 'repeater_field_name' );

	// Get a random rows. Change the second parameter in array_rand() to how many rows you want.
	$random_rows = array_rand( $repeater, 2 );

	// Loop through the random rows if more than one is returned
	if( is_array( $random_rows ) ){

wesrice

<?php
function update_value( $post_id, $field, $value ){
		
	// Check to see if there are any old relationships
	if( parent::get_value( $post_id, $field ) !== '' ){
		
		// If so, find out what needs to be added or deleted
		$old_value = explode( ',', parent::get_value( $post_id, $field ) );
				
		$new_value = explode( ',', $value );