แนะนำแนวทางทีครับ ว่าควรจะเขียนอย่างไร ขอบคุณครับ

<?
function vowelcount($a){
$a1=substr($a,0,1);
$a2=substr($a,1,1);
$a3=substr($a,2,1);
$a4=substr($a,3,1);
$a5=substr($a,4,1);
$a6=substr($a,5,1);
if($a1=="A"||$a1=="E"||$a1=="I"||$a1=="O"||$a1=="U"){
$a1=1;
}else{
$a1=0;
}
if($a2=="A"||$a2=="E"||$a2=="I"||$a2=="O"||$a2=="U"){
$a2=1;
}else{
$a2=0;
}
if($a3=="A"||$a3=="E"||$a3=="I"||$a3=="O"||$a3=="U"){
$a3=1;
}else{
$a3=0;
}
if($a4=="A"||$a4=="E"||$a4=="I"||$a4=="O"||$a4=="U"){
$a4=1;
}else{
$a4=0;
}
if($a5=="A"||$a5=="E"||$a5=="I"||$a5=="O"||$a5=="U"){
$a5=1;
}else{
$a5=0;
}
if($a6=="A"||$a6=="E"||$a6=="I"||$a6=="O"||$a6=="U"){
$a6=1;
}else{
$a6=0;
}
$total=$a1+$a2+$a3+$a4+$a5+$a6;
return $total;
}
$z=0;
$a=array("A","A","B","B","C","C","D","D","E","E","E","F","G","G","H","I", "I","K","L","L","M","M","N","N","O","O","P","R","R","S","S","T","T","U","U","V","Y");
//$with=array("A","B","C","D","E","F","G","H","I","J","K","L" ,"M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
for($c1=0;$c1<32;$c1++){
	if($a[$c1]==$t){
		continue;
	}
	$t=$a[$c1];
	for($c2=1;$c2<33;$c2++){
		if($c1>=$c2){
			continue;
		}
			if($a[$c2]==$u){
				continue;
			}
			$u=$a[$c2];
		for($c3=2;$c3<34;$c3++){
			if($c2>=$c3){
				continue;
			}
				if($a[$c3]==$v){
					continue;
				}
				$v=$a[$c3];
			for($c4=3;$c4<35;$c4++){
				if($c3>=$c4){
					continue;
				}
					if($a[$c4]==$w){
						continue;
					}
					$w=$a[$c4];
				for($c5=4;$c5<36;$c5++){
					if($c4>=$c5){
						continue;
					}
					if($a[$c5]==$x){
						continue;
					}
					$x=$a[$c5];
					for($c6=5;$c6<37;$c6++){
						if($c5>=$c6){
							continue;
						}
						if($y==$a[$c6]){
							continue;
						}
						$b=$a[$c1].$a[$c2].$a[$c3].$a[$c4].$a[$c5].$a[$c6];
						if(vowelcount($b)<2){
							continue;
						}
						print"$b<br>";
						$y=$a[$c6];
						$z++;
					}
				}
			}	
		}
	}
}
print $z;
?>