chore: fix styles and phpstan (#440)

Author: bshaffer

src/JWK.php

@@ -179,7 +179,7 @@ private static function createPemFromCrvAndXYCoordinates(string $crv, string $x,
                 ) .
                 self::encodeDER(
                     self::ASN1_BIT_STRING,
-                    chr(0x00) . chr(0x04)
+                    \chr(0x00) . \chr(0x04)
                     . JWT::urlsafeB64Decode($x)
                     . JWT::urlsafeB64Decode($y)
                 )
@@ -295,21 +295,21 @@ private static function encodeOID(string $oid): string
         // Get the first octet
         $first = (int) array_shift($octets);
         $second = (int) array_shift($octets);
-        $oid = chr($first * 40 + $second);
+        $oid = \chr($first * 40 + $second);
 
         // Iterate over subsequent octets
         foreach ($octets as $octet) {
             if ($octet == 0) {
-                $oid .= chr(0x00);
+                $oid .= \chr(0x00);
                 continue;
             }
             $bin = '';
 
             while ($octet) {
-                $bin .= chr(0x80 | ($octet & 0x7f));
+                $bin .= \chr(0x80 | ($octet & 0x7f));
                 $octet >>= 7;
             }
-            $bin[0] = $bin[0] & chr(0x7f);
+            $bin[0] = $bin[0] & \chr(0x7f);
 
             // Convert to big endian if necessary
             if (pack('V', 65534) == pack('L', 65534)) {

src/JWT.php

@@ -301,20 +301,20 @@ private static function verify(
                     'OpenSSL error: ' . \openssl_error_string()
                 );
             case 'sodium_crypto':
-              if (!\function_exists('sodium_crypto_sign_verify_detached')) {
-                  throw new DomainException('libsodium is not available');
-              }
-              if (!\is_string($keyMaterial)) {
-                  throw new InvalidArgumentException('key must be a string when using EdDSA');
-              }
-              try {
-                  // The last non-empty line is used as the key.
-                  $lines = array_filter(explode("\n", $keyMaterial));
-                  $key = base64_decode((string) end($lines));
-                  return sodium_crypto_sign_verify_detached($signature, $msg, $key);
-              } catch (Exception $e) {
-                  throw new DomainException($e->getMessage(), 0, $e);
-              }
+                if (!\function_exists('sodium_crypto_sign_verify_detached')) {
+                    throw new DomainException('libsodium is not available');
+                }
+                if (!\is_string($keyMaterial)) {
+                    throw new InvalidArgumentException('key must be a string when using EdDSA');
+                }
+                try {
+                    // The last non-empty line is used as the key.
+                    $lines = array_filter(explode("\n", $keyMaterial));
+                    $key = base64_decode((string) end($lines));
+                    return sodium_crypto_sign_verify_detached($signature, $msg, $key);
+                } catch (Exception $e) {
+                    throw new DomainException($e->getMessage(), 0, $e);
+                }
             case 'hash_hmac':
             default:
                 if (!\is_string($keyMaterial)) {
@@ -510,7 +510,7 @@ private static function signatureToDER(string $sig): string
     {
         // Separate the signature into r-value and s-value
         $length = max(1, (int) (\strlen($sig) / 2));
-        list($r, $s) = \str_split($sig, $length > 0 ? $length : 1);
+        list($r, $s) = \str_split($sig, $length);
 
         // Trim leading zeros
         $r = \ltrim($r, "\x00");