<?php
$string = array("string-1","string-2","string-3","string-4" );
$replace = array("new-string-1","new-string-2","new-string-3","new-string-4");
$fieldname = get_field('fieldname', $term); // it is a meta-field for a taxonomy term
$replaces = str_replace($string , $replace , $fieldname);
foreach ($replaces as $wert)
{
echo $wert . ',';
}
?>
Sorry, that was not my day.