Loop Solution for Philbish

gistfile1.php

<?php

$a = array();

$max_odd = 93;
$max_even = 72;
$prefix = 'B-';

$o = -1;
$e = 0;

while ($o <= $max_odd OR $e <= $max_even)
{
	for ($i = 0; $i < 2; $i++)
	{
		if (($e += 2) <= $max_even)
		{
			$a[] = $prefix.$e;
		}
	}
	
	for ($i = 0; $i < 3; $i++)
	{
		if (($o += 2) <= $max_odd)
		{
			$a[] = $prefix.$o;
		}
	}
}

print_r($a);