[11.x] Ability to generate URL's with query params (#51075)

* Add ability to generate a URL with query parameters

* Add tests

* CS fixes

* formatting

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: stevebauman

src/Illuminate/Routing/UrlGenerator.php

@@ -230,6 +230,26 @@ public function to($path, $extra = [], $secure = null)
         ).$query;
     }
 
+    /**
+     * Generate an absolute URL with the given query parameters.
+     *
+     * @param  string  $path
+     * @param  array  $query
+     * @param  mixed  $extra
+     * @param  bool|null  $secure
+     * @return string
+     */
+    public function query($path, $query = [], $extra = [], $secure = null)
+    {
+        [$path, $existingQueryString] = $this->extractQueryString($path);
+
+        parse_str(Str::after($existingQueryString, '?'), $existingQueryArray);
+
+        return $this->to($path.'?'.Arr::query(
+            array_merge($existingQueryArray, $query)
+        ), $extra, $secure);
+    }
+
     /**
      * Generate a secure, absolute URL to the given path.
      *

tests/Routing/RoutingUrlGeneratorTest.php

@@ -42,6 +42,21 @@ public function testBasicGeneration()
         $this->assertSame('https://www.foo.com/foo/bar', $url->to('foo/bar'));
     }
 
+    public function testQueryGeneration()
+    {
+        $url = new UrlGenerator(
+            new RouteCollection,
+            Request::create('http://www.foo.com/')
+        );
+
+        $this->assertSame('http://www.foo.com/foo/bar?', $url->query('foo/bar'));
+        $this->assertSame('http://www.foo.com/foo/bar?0=foo', $url->query('foo/bar', ['foo']));
+        $this->assertSame('http://www.foo.com/foo/bar?baz=boom', $url->query('foo/bar', ['baz' => 'boom']));
+        $this->assertSame('http://www.foo.com/foo/bar?baz=zee&zal=bee', $url->query('foo/bar?baz=boom&zal=bee', ['baz' => 'zee']));
+        $this->assertSame('https://www.foo.com/foo/bar/baz?foo=bar&zal=bee', $url->query('foo/bar?foo=bar', ['zal' => 'bee'], ['baz'], true));
+        $this->assertSame('http://www.foo.com/foo/bar?baz[0]=boom&baz[1]=bam&baz[2]=bim', urldecode($url->query('foo/bar', ['baz' => ['boom', 'bam', 'bim']])));
+    }
+
     public function testAssetGeneration()
     {
         $url = new UrlGenerator(