3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a($n){$F='%1$'.($n-1)."s*%1\$s\n";$L='';do printf($F,$n?$L:'');while($n--&&$L.='*');} a(5);
preferences:
24.32 ms | 404 KiB | 5 Q