solve.php hinzugefügt

solve.php

@@ -0,0 +1,26 @@
+<?php
+
+error_reporting(E_ALL);
+ini_set("display_errors", 1);
+
+$number = 0;
+
+while ($number < 500000) {
+    $number++;
+
+    if (!isSquareNumber($number) or !crossSumIs43($number)) {
+        continue;
+    }
+
+    echo "FOUND: $number\n";
+}
+
+function isSquareNumber($number): bool
+{
+    return ($sqrt = sqrt($number)) == floor($sqrt);
+}
+
+function crossSumIs43($number): bool
+{
+    return array_sum(str_split(strval($number))) === 43;
+}