Functions to add ordinal suffix to day values and convert integer months to string.

format_date.php

<?php

// Add ordinal suffix to day
function fnDay_Format($iday)
{
  if(empty($iday))
    die("No parameter passed to function.");
  else
    $iday = intval($iday);

  if($iday < 1 || $iday > 31)
    die("Invalid parameter passed to function.");
    
  $asuffix = array('th','st','nd','rd','th','th','th','th','th','th');
  if (($iday %100) >= 11 && ($iday % 100) <= 13)
     $sdate = $iday. 'th';
  else
     $sdate = $iday.$asuffix[$iday % 10];
   
  return $sdate;
}

// Convert integer month to string
function fnMonth_Format($imonth)
{
  if(empty($imonth))
    die("No parameter passed to function.");
  else
    $imonth = intval($imonth);

  if($imonth < 1 || $imonth > 12)
    die("Invalid parameter passed to function.");
    
  $amonths = array(1=>"January", 2=>"February", 3=>"March",
    4=>"April", 5=>"May", 6=>"June", 7=>"July", 8=>"August",
    9=>"September", 10=>"October", 11=>"November", 12=>"December");
    
  return $amonths[$imonth];
}

?>