Online PHP editor | refs for Cnd8n

@ 2014-09-15T04:42:57Z

<?php

$names = array('Anderson','Beresford','Donovan','Amit','Graham');

$alphabet = array();
$previous_letter = '';

foreach($names as $value) {
  if($value[0] != $previous_letter) {
    $alphabet[] = $previous_letter = $value[0];
  }
}

print_r($alphabet);

?>