<?PHP
$r[cow]=moo;
$r[sheep]=baa;
$r[duck]=quack;
$r[pig]=oink;
$s=array();
foreach($r as $a=>$b){
	$t=a;
	if($b=="oink")$t=an;
	echo"Old MacDonald had a farm, E-I-E-I-O.\n";
	echo"And on his farm he had a $a, E-I-E-I-O.\n";
	echo"With $t $b-$b here, and $t $b-$b there.\n";
	echo"Here $t $b, there $t $b, everywhere $t $b-$b.\n";
	foreach($s as $k=>$c){
		echo"A $c-$c here, and a $c-$c there.\n";
		echo"Here a $c, there a $c, everywhere a $c-$c.\n";
	}
	echo"Old MacDonald had a farm, E-I-E-I-O.\n\n";
	array_unshift($s,$b);
}