unset($a);
$a[]=1;
$a[]=2;
$a[]=3;
$a[]="red";
$a[]="green";
$a[]="blue";
$a[]="none";

$i=0;
$found="not found";
for ($i=0; $i < count($a); $i++) {
  if ( is_long($a[$i]) ) { // skip all integer elements
     continue;
  }
  if ($a[$i] == "blue") {
     $found=$a[$i];
     break;
  }
}
echo $found,"<BR>\n";

?>