<?php
//Guntur Ahmad Lion Putranto 10122554 3KA31
$baris = 5; // Jumlah baris segitiga

$i = 1;
do {
    for ($j = 1; $j <= $baris - $i + 1; $j++) {
        echo "<p>&nbsp</p>";
    }
    for ($k = 1; $k <= $i; $k++) {
        echo "$k";
    }
    echo "\n";
    $i++;
} while ($i <= $baris);
?>