diff --git a/phpseclib/File/X509.php b/phpseclib/File/X509.php
index df10ad34..05f23dd2 100644
--- a/phpseclib/File/X509.php
+++ b/phpseclib/File/X509.php
@@ -2888,7 +2888,7 @@ class X509
 
         switch (true) {
             case !($algorithm = $this->_subArray($csr, 'certificationRequestInfo/subjectPKInfo/algorithm/algorithm')):
-            case is_object($csr['certificationRequestInfo']['subjectPKInfo']['subjectPublicKey']);
+            case is_object($csr['certificationRequestInfo']['subjectPKInfo']['subjectPublicKey']):
                 break;
             default:
                 switch ($algorithm) {
@@ -3012,7 +3012,7 @@ class X509
         $algorithm = $this->_subArray($spkac, 'publicKeyAndChallenge/spki/algorithm/algorithm');
         switch (true) {
             case !$algorithm:
-            case is_object($spkac['publicKeyAndChallenge']['spki']['subjectPublicKey']);
+            case is_object($spkac['publicKeyAndChallenge']['spki']['subjectPublicKey']):
                 break;
             default:
                 switch ($algorithm) {
@@ -4091,7 +4091,7 @@ class X509
                     case $disposition == self::ATTR_APPEND:
                         $last = $key;
                         break;
-                    case $disposition >= $n;
+                    case $disposition >= $n:
                         $disposition -= $n;
                         break;
                     default:
diff --git a/phpseclib/Net/SFTP.php b/phpseclib/Net/SFTP.php
index 27212eff..1e981bd2 100644
--- a/phpseclib/Net/SFTP.php
+++ b/phpseclib/Net/SFTP.php
@@ -1807,7 +1807,7 @@ class SFTP extends SSH2
         // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.2.3
         $dataCallback = false;
         switch (true) {
-            case $mode & self::SOURCE_CALLBACK;
+            case $mode & self::SOURCE_CALLBACK:
                 if (!is_callable($data)) {
                     user_error("\$data should be is_callable() if you specify SOURCE_CALLBACK flag");
                 }
diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 9bf8921e..8100703d 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -1322,7 +1322,7 @@ class SSH2
             case 'arcfour256':
                 $decryptKeyLength = 32; // eg. 128 / 8
                 break;
-            case 'none';
+            case 'none':
                 $decryptKeyLength = 0;
         }
 
@@ -1366,7 +1366,7 @@ class SSH2
             case 'arcfour256':
                 $encryptKeyLength = 32;
                 break;
-            case 'none';
+            case 'none':
                 $encryptKeyLength = 0;
         }
 
@@ -1555,7 +1555,7 @@ class SSH2
             case 'arcfour256':
                 $this->encrypt = new RC4();
                 break;
-            case 'none';
+            case 'none':
                 //$this->encrypt = new Null();
         }
 
@@ -1604,7 +1604,7 @@ class SSH2
             case 'arcfour256':
                 $this->decrypt = new RC4();
                 break;
-            case 'none';
+            case 'none':
                 //$this->decrypt = new Null();
         }