Data commit

Task/Sierpinski-triangle/PHP/sierpinski-triangle.php

@@ -0,0 +1,24 @@
+<?php
+
+function sierpinskiTriangle($order) {
+    $char = '#';
+    $n = 1 << $order;
+    $line = array();
+    for ($i = 0 ; $i <= 2 * $n ; $i++) {
+        $line[$i] = ' ';
+    }
+    $line[$n] = $char;
+    for ($i = 0 ; $i < $n ; $i++) {
+        echo implode('', $line), PHP_EOL;
+        $u = $char;
+        for ($j = $n - $i ; $j < $n + $i + 1 ; $j++) {
+            $t = ($line[$j - 1] == $line[$j + 1] ? ' ' : $char);
+            $line[$j - 1] = $u;
+            $u = $t;
+        }
+        $line[$n + $i] = $t;
+        $line[$n + $i + 1] = $char;
+    }
+}
+
+sierpinskiTriangle(4);