diff --git a/test.php b/test.php
new file mode 100644
index 0000000..9ba6cd5
--- /dev/null
+++ b/test.php
@@ -0,0 +1,23 @@
+<?php
+// PHP
+
+function gcd(int $a, int $b) {
+    if ($b > 0) return gcd($b, $a % $b);
+    else return $a;
+}
+
+echo "test\n";
+
+const N = 1000;
+$A = array();
+for ($i = 0; $i < N; $i++) {
+    $A[$i] = $i;
+}
+
+$ans = 0;
+foreach ($A as $i) {
+    foreach ($A as $j) {
+        $ans += gcd($i, $j);
+    }
+}
+echo $ans;