From 4bf2c0ac671ee55df397d7ddb20aa39c1d51e770 Mon Sep 17 00:00:00 2001
From: Brian Moon <brian@moonspot.net>
Date: Tue, 26 Mar 2024 13:15:57 -0500
Subject: [PATCH] Make inputArray behave like filter_input_array and return
 null when no data available

---
 src/Filter.php       | 25 ++++++++++++++++++++++++-
 tests/FilterTest.php | 30 +++++++++++++++++++++---------
 2 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/src/Filter.php b/src/Filter.php
index e0012a5..f3cce43 100644
--- a/src/Filter.php
+++ b/src/Filter.php
@@ -83,6 +83,30 @@ public function var(mixed $value, int $filter = FILTER_DEFAULT, array|int $optio
      * @see https://www.php.net/manual/en/function.filter-input-array.php
      */
     public function inputArray(int $type, array|int $options = FILTER_DEFAULT, bool $add_empty = true): array|false|null {
+        $empty = false;
+        switch ($type) {
+            case INPUT_GET:
+                $empty = empty($_GET);
+                break;
+            case INPUT_POST:
+                $empty = empty($_POST);
+                break;
+            case INPUT_COOKIE:
+                $empty = empty($_COOKIE);
+                break;
+            case INPUT_SERVER:
+                $empty = empty($_SERVER);
+                break;
+            case INPUT_ENV:
+                $empty = empty($_ENV);
+                break;
+        }
+
+        // this is how filter_input_array behaves
+        if ($empty) {
+            return null;
+        }
+
         return $this->varArray(filter_input_array($type) ?? [], $options, $add_empty);
     }
 
@@ -158,7 +182,6 @@ public function fixOptions(array|int $options): array|int {
                         'options' => $this->sanitizeString(),
                     ];
                 } elseif (is_array($filter) && $filter['filter'] === $this::FILTER_SANITIZE_STRING) {
-
                     if (!empty($filter['flags']) && is_array($filter['flags'])) {
                         $flags = 0;
                         foreach ($filter['flags'] as $flag) {
diff --git a/tests/FilterTest.php b/tests/FilterTest.php
index ba2599c..cfa6127 100644
--- a/tests/FilterTest.php
+++ b/tests/FilterTest.php
@@ -5,7 +5,6 @@
 use DealNews\Filter\Filter;
 
 class FilterTest extends \PHPUnit\Framework\TestCase {
-
     /**
      * Test the input methods that they don't throw errors
      */
@@ -20,13 +19,28 @@ public function testInput() {
      */
     public function testInputArray() {
         $f     = Filter::init();
+        $value = $f->inputArray(INPUT_GET, ['foo' => FILTER_VALIDATE_INT]);
+        $this->assertNull($value);
         $value = $f->inputArray(INPUT_POST, ['foo' => FILTER_VALIDATE_INT]);
-        $this->assertSame(
-            [
-                'foo' => null
-            ],
-            $value
-        );
+        $this->assertNull($value);
+        $value = $f->inputArray(INPUT_COOKIE, ['foo' => FILTER_VALIDATE_INT]);
+        $this->assertNull($value);
+
+        $expect     = array_slice($_SERVER, 0, 5);
+        $keys       = [];
+        $expect_bug = [];
+        foreach (array_keys($expect) as $key) {
+            $keys[$key] = FILTER_UNSAFE_RAW;
+            // https://bugs.php.net/bug.php?id=49184
+            // filtering on INPUT_SERVER yields an array with null values
+            $expect_bug[$key] = null;
+        }
+
+        $value = $f->inputArray(INPUT_SERVER, $keys);
+        $this->assertEquals($expect_bug, $value);
+
+        $value = $f->inputArray(INPUT_ENV, $keys);
+        $this->assertEquals($expect, $value);
     }
 
     /**
@@ -114,8 +128,6 @@ public function varArrayData() {
                 ],
             ],
 
-
-
         ];
     }