4*$d-4;$d++)$a.=" ";$f="array_fill";$e=$f(0,$d,$f(0,$d," "));$d--;for($f=0;$f<$d;$f++){$e[0][$f]=$a[$f];$e[$f][$d]=$a[$f+$d];$e[$d][$d-$f]=$a[$f+2*$d];$e[$d-$f][0]=$a[$f+3*$d];}foreach($e as$g)echo implode('',$g)."\n";