Can't compose constants in PHP 5.5

Author: rowan-m

src/ReCaptcha/RequestMethod/SocketPost.php

@@ -37,16 +37,6 @@
  */
 class SocketPost implements RequestMethod
 {
-    /**
-     * @const string Bad request error
-     */
-    const BAD_CONNECTION = '{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_CONNECTION.'"]}';
-
-    /**
-     * @const string Bad response error
-     */
-    const BAD_RESPONSE = '{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_RESPONSE.'"]}';
-
     /**
      * Socket to the reCAPTCHA service
      * @var Socket
@@ -78,7 +68,7 @@ public function submit(RequestParameters $params)
         $urlParsed = parse_url($this->siteVerifyUrl);
 
         if (false === $this->socket->fsockopen('ssl://' . $urlParsed['host'], 443, $errno, $errstr, 30)) {
-            return self::BAD_CONNECTION;
+            return '{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_CONNECTION.'"]}';
         }
 
         $content = $params->toQueryString();
@@ -100,7 +90,7 @@ public function submit(RequestParameters $params)
         $this->socket->fclose();
 
         if (0 !== strpos($response, 'HTTP/1.1 200 OK')) {
-            return self::BAD_RESPONSE;
+            return '{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_RESPONSE.'"]}';
         }
 
         $parts = preg_split("#\n\s*\n#Uis", $response);

tests/ReCaptcha/RequestMethod/SocketPostTest.php

@@ -26,6 +26,7 @@
 
 namespace ReCaptcha\RequestMethod;
 
+use ReCaptcha\ReCaptcha;
 use ReCaptcha\RequestParameters;
 use PHPUnit\Framework\TestCase;
 
@@ -108,7 +109,7 @@ public function testSubmitBadResponse()
 
         $ps = new SocketPost($socket);
         $response = $ps->submit(new RequestParameters("secret", "response", "remoteip", "version"));
-        $this->assertEquals(SocketPost::BAD_RESPONSE, $response);
+        $this->assertEquals('{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_RESPONSE.'"]}', $response);
     }
 
     public function testSubmitBadRequest()
@@ -122,6 +123,6 @@ public function testSubmitBadRequest()
                 ->willReturn(false);
         $ps = new SocketPost($socket);
         $response = $ps->submit(new RequestParameters("secret", "response", "remoteip", "version"));
-        $this->assertEquals(SocketPost::BAD_CONNECTION, $response);
+        $this->assertEquals('{"success": false, "error-codes": ["'.ReCaptcha::E_BAD_CONNECTION.'"]}', $response);
     }
 }