abraham · Zerquix18 · Oct 9, 2018
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,6 @@
 language: php
 dist: trusty
 php:
-  - '5.6'
-  - '7.0'
   - '7.1'
   - '7.2'
   - nightly

diff --git a/src/Config.php b/src/Config.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 
 namespace Abraham\TwitterOAuth;
 
@@ -43,10 +44,10 @@ class Config
      * @param int $connectionTimeout
      * @param int $timeout
      */
-    public function setTimeouts($connectionTimeout, $timeout)
+    public function setTimeouts(int $connectionTimeout, int $timeout): void
     {
-        $this->connectionTimeout = (int)$connectionTimeout;
-        $this->timeout = (int)$timeout;
+        $this->connectionTimeout = $connectionTimeout;
+        $this->timeout = $timeout;
     }
 
     /**
@@ -55,32 +56,32 @@ public function setTimeouts($connectionTimeout, $timeout)
      * @param int $maxRetries
      * @param int $retriesDelay
      */
-    public function setRetries($maxRetries, $retriesDelay)
+    public function setRetries(int $maxRetries, int $retriesDelay): void
     {
-        $this->maxRetries = (int)$maxRetries;
-        $this->retriesDelay = (int)$retriesDelay;
+        $this->maxRetries = $maxRetries;
+        $this->retriesDelay = $retriesDelay;
     }
 
     /**
      * @param bool $value
      */
-    public function setDecodeJsonAsArray($value)
+    public function setDecodeJsonAsArray(bool $value): void
     {
-        $this->decodeJsonAsArray = (bool)$value;
+        $this->decodeJsonAsArray = $value;
     }
 
     /**
      * @param string $userAgent
      */
-    public function setUserAgent($userAgent)
+    public function setUserAgent(string $userAgent): void
     {
-        $this->userAgent = (string)$userAgent;
+        $this->userAgent = $userAgent;
     }
 
     /**
      * @param array $proxy
      */
-    public function setProxy(array $proxy)
+    public function setProxy(array $proxy): void
     {
         $this->proxy = $proxy;
     }
@@ -90,18 +91,18 @@ public function setProxy(array $proxy)
      *
      * @param boolean $gzipEncoding
      */
-    public function setGzipEncoding($gzipEncoding)
+    public function setGzipEncoding(bool $gzipEncoding): void
     {
-        $this->gzipEncoding = (bool)$gzipEncoding;
+        $this->gzipEncoding = $gzipEncoding;
     }
 
     /**
      * Set the size of each part of file for chunked media upload.
      *
      * @param int $value
      */
-    public function setChunkSize($value)
+    public function setChunkSize(int $value): void
     {
-        $this->chunkSize = (int)$value;
+        $this->chunkSize = $value;
     }
 }
diff --git a/src/Consumer.php b/src/Consumer.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * The MIT License
  * Copyright (c) 2007 Andy Smith
@@ -15,11 +17,11 @@ class Consumer
     public $callbackUrl;
 
     /**
-     * @param string $key
-     * @param string $secret
+     * @param string|null $key
+     * @param string|null $secret
      * @param null $callbackUrl
      */
-    public function __construct($key, $secret, $callbackUrl = null)
+    public function __construct(?string $key, ?string $secret, ?string $callbackUrl = null)
     {
         $this->key = $key;
         $this->secret = $secret;

diff --git a/src/HmacSha1.php b/src/HmacSha1.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * The MIT License
  * Copyright (c) 2007 Andy Smith
@@ -25,7 +27,7 @@ public function getName()
     /**
      * {@inheritDoc}
      */
-    public function buildSignature(Request $request, Consumer $consumer, Token $token = null)
+    public function buildSignature(Request $request, Consumer $consumer, Token $token = null): string
     {
         $signatureBase = $request->getSignatureBaseString();
 

diff --git a/src/Request.php b/src/Request.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * The MIT License
  * Copyright (c) 2007 Andy Smith
@@ -20,7 +22,7 @@ class Request
      * @param string     $httpUrl
      * @param array|null $parameters
      */
-    public function __construct($httpMethod, $httpUrl, array $parameters = [])
+    public function __construct(string $httpMethod, string $httpUrl, ?array $parameters = [])
     {
         $parameters = array_merge(Util::parseParameters(parse_url($httpUrl, PHP_URL_QUERY)), $parameters);
         $this->parameters = $parameters;
@@ -42,8 +44,8 @@ public function __construct($httpMethod, $httpUrl, array $parameters = [])
     public static function fromConsumerAndToken(
         Consumer $consumer,
         Token $token = null,
-        $httpMethod,
-        $httpUrl,
+        string $httpMethod,
+        string $httpUrl,
         array $parameters = [],
         $json = false
     ) {
@@ -72,7 +74,7 @@ public static function fromConsumerAndToken(
      * @param string $name
      * @param string $value
      */
-    public function setParameter($name, $value)
+    public function setParameter(string $name, string $value)
     {
         $this->parameters[$name] = $value;
     }
@@ -82,23 +84,23 @@ public function setParameter($name, $value)
      *
      * @return string|null
      */
-    public function getParameter($name)
+    public function getParameter(string $name): ?string
     {
         return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
     }
 
     /**
      * @return array
      */
-    public function getParameters()
+    public function getParameters(): array
     {
         return $this->parameters;
     }
 
     /**
      * @param $name
      */
-    public function removeParameter($name)
+    public function removeParameter(string $name): void
     {
         unset($this->parameters[$name]);
     }
@@ -108,7 +110,7 @@ public function removeParameter($name)
      *
      * @return string
      */
-    public function getSignableParameters()
+    public function getSignableParameters(): string
     {
         // Grab all parameters
         $params = $this->parameters;
@@ -131,7 +133,7 @@ public function getSignableParameters()
      *
      * @return string
      */
-    public function getSignatureBaseString()
+    public function getSignatureBaseString(): string
     {
         $parts = [
             $this->getNormalizedHttpMethod(),
@@ -149,7 +151,7 @@ public function getSignatureBaseString()
      *
      * @return string
      */
-    public function getNormalizedHttpMethod()
+    public function getNormalizedHttpMethod(): string
     {
         return strtoupper($this->httpMethod);
     }
@@ -160,7 +162,7 @@ public function getNormalizedHttpMethod()
      *
      * @return string
      */
-    public function getNormalizedHttpUrl()
+    public function getNormalizedHttpUrl(): string
     {
         $parts = parse_url($this->httpUrl);
 
@@ -176,7 +178,7 @@ public function getNormalizedHttpUrl()
      *
      * @return string
      */
-    public function toUrl()
+    public function toUrl(): string
     {
         $postData = $this->toPostdata();
         $out = $this->getNormalizedHttpUrl();
@@ -191,7 +193,7 @@ public function toUrl()
      *
      * @return string
      */
-    public function toPostdata()
+    public function toPostdata(): string
     {
         return Util::buildHttpQuery($this->parameters);
     }
@@ -202,7 +204,7 @@ public function toPostdata()
      * @return string
      * @throws TwitterOAuthException
      */
-    public function toHeader()
+    public function toHeader(): string
     {
         $first = true;
         $out = 'Authorization: OAuth';
@@ -223,7 +225,7 @@ public function toHeader()
     /**
      * @return string
      */
-    public function __toString()
+    public function __toString(): string
     {
         return $this->toUrl();
     }
@@ -247,15 +249,15 @@ public function signRequest(SignatureMethod $signatureMethod, Consumer $consumer
      *
      * @return string
      */
-    public function buildSignature(SignatureMethod $signatureMethod, Consumer $consumer, Token $token = null)
+    public function buildSignature(SignatureMethod $signatureMethod, Consumer $consumer, Token $token = null): string
     {
         return $signatureMethod->buildSignature($this, $consumer, $token);
     }
 
     /**
      * @return string
      */
-    public static function generateNonce()
+    public static function generateNonce(): string
     {
         return md5(microtime() . mt_rand());
     }

diff --git a/src/Response.php b/src/Response.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 
 namespace Abraham\TwitterOAuth;
 
@@ -23,15 +24,15 @@ class Response
     /**
      * @param string $apiPath
      */
-    public function setApiPath($apiPath)
+    public function setApiPath(string $apiPath): void
     {
         $this->apiPath = $apiPath;
     }
 
     /**
      * @return string|null
      */
-    public function getApiPath()
+    public function getApiPath(): ?string
     {
         return $this->apiPath;
     }
@@ -55,23 +56,23 @@ public function getBody()
     /**
      * @param int $httpCode
      */
-    public function setHttpCode($httpCode)
+    public function setHttpCode(int $httpCode): void
     {
         $this->httpCode = $httpCode;
     }
 
     /**
      * @return int
      */
-    public function getHttpCode()
+    public function getHttpCode(): int
     {
         return $this->httpCode;
     }
 
     /**
      * @param array $headers
      */
-    public function setHeaders(array $headers)
+    public function setHeaders(array $headers): void
     {
         foreach ($headers as $key => $value) {
             if (substr($key, 0, 1) == 'x') {
@@ -84,23 +85,23 @@ public function setHeaders(array $headers)
     /**
      * @return array
      */
-    public function getsHeaders()
+    public function getsHeaders(): array
     {
         return $this->headers;
     }
 
     /**
      * @param array $xHeaders
      */
-    public function setXHeaders(array $xHeaders = [])
+    public function setXHeaders(array $xHeaders = []): void
     {
         $this->xHeaders = $xHeaders;
     }
 
     /**
      * @return array
      */
-    public function getXHeaders()
+    public function getXHeaders(): array
     {
         return $this->xHeaders;
     }

diff --git a/src/SignatureMethod.php b/src/SignatureMethod.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * The MIT License
  * Copyright (c) 2007 Andy Smith
@@ -42,7 +44,7 @@ abstract public function buildSignature(Request $request, Consumer $consumer, To
      *
      * @return bool
      */
-    public function checkSignature(Request $request, Consumer $consumer, Token $token, $signature)
+    public function checkSignature(Request $request, Consumer $consumer, Token $token, string $signature): bool
     {
         $built = $this->buildSignature($request, $consumer, $token);