fix: Request::json() json errors when decoding empty string

Author: calebdw

src/Illuminate/Http/Request.php

@@ -405,7 +405,7 @@ public function get(string $key, mixed $default = null): mixed
  public function json($key = null, $default = null)
  {
  if (! isset($this->json)) {
- $this->json = new InputBag((array) json_decode($this->getContent(), true));
+ $this->json = new InputBag((array) json_decode($this->getContent() ?: '[]', true));
  }
 
  if (is_null($key)) {

tests/Http/HttpRequestTest.php

@@ -1606,4 +1606,14 @@ public function testItCanHaveObjectsInJsonPayload()
 
  $this->assertSame(['name' => 'Laravel'], $request->get('framework'));
  }
+
+ public function testItDoesNotGenerateJsonErrors()
+ {
+ // clear any existing errors
+ json_encode(null);
+
+ Request::create('', 'GET')->json();
+
+ $this->assertTrue(json_last_error() === JSON_ERROR_NONE);
+ }
 }