minor symfony#14738 [HttpFoundation] Get response content as resource several times for PHP >= 5.6 (dunglas)

This PR was squashed before being merged into the 2.3 branch (closes symfony#14738).

Discussion
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[HttpFoundation] Get response content as resource several times for PHP >= 5.6

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Since PHP 5.6, `php://input` can be opened several times.

Commits
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9f9b0f7 [HttpFoundation] Get response content as resource several times for PHP >= 5.6

Author: fabpot

src/Symfony/Component/HttpFoundation/Request.php

@@ -1459,8 +1459,8 @@ public function isMethodSafe()
      */
     public function getContent($asResource = false)
     {
-        if (false === $this->content || (true === $asResource && null !== $this->content)) {
-            throw new \LogicException('getContent() can only be called once when using the resource return type.');
+        if (PHP_VERSION_ID < 50600 && (false === $this->content || (true === $asResource && null !== $this->content))) {
+            throw new \LogicException('getContent() can only be called once when using the resource return type and PHP below 5.6.');
         }
 
         if (true === $asResource) {

src/Symfony/Component/HttpFoundation/Tests/RequestTest.php

@@ -929,11 +929,40 @@ public function testGetContentReturnsResource()
      */
     public function testGetContentCantBeCalledTwiceWithResources($first, $second)
     {
+        if (PHP_VERSION_ID >= 50600) {
+            $this->markTestSkipped('PHP >= 5.6 allows to open php://input several times.');
+        }
+
         $req = new Request();
         $req->getContent($first);
         $req->getContent($second);
     }
 
+    /**
+     *
+     * @dataProvider getContentCantBeCalledTwiceWithResourcesProvider
+     */
+    public function testGetContentCanBeCalledTwiceWithResources($first, $second)
+    {
+        if (PHP_VERSION_ID < 50600) {
+            $this->markTestSkipped('PHP < 5.6 does not allow to open php://input several times.');
+        }
+
+        $req = new Request();
+        $a = $req->getContent($first);
+        $b = $req->getContent($second);
+
+        if ($first) {
+            $a = stream_get_contents($a);
+        }
+
+        if ($second) {
+            $b = stream_get_contents($b);
+        }
+
+        $this->assertEquals($a, $b);
+    }
+
     public function getContentCantBeCalledTwiceWithResourcesProvider()
     {
         return array(