diff --git a/phpseclib/Crypt/Blowfish.php b/phpseclib/Crypt/Blowfish.php
index c3c9cb10..a0d320ec 100644
--- a/phpseclib/Crypt/Blowfish.php
+++ b/phpseclib/Crypt/Blowfish.php
@@ -411,14 +411,14 @@ class Blowfish extends BlockCipher
      */
     protected function encryptBlock($in)
     {
-        $p = $this->bctx["p"];
-        // extract($this->bctx["sb"], EXTR_PREFIX_ALL, "sb"); // slower
-        $sb_0 = $this->bctx["sb"][0];
-        $sb_1 = $this->bctx["sb"][1];
-        $sb_2 = $this->bctx["sb"][2];
-        $sb_3 = $this->bctx["sb"][3];
+        $p = $this->bctx['p'];
+        // extract($this->bctx['sb'], EXTR_PREFIX_ALL, 'sb'); // slower
+        $sb_0 = $this->bctx['sb'][0];
+        $sb_1 = $this->bctx['sb'][1];
+        $sb_2 = $this->bctx['sb'][2];
+        $sb_3 = $this->bctx['sb'][3];
 
-        $in = unpack("N*", $in);
+        $in = unpack('N*', $in);
         $l = $in[1];
         $r = $in[2];
 
@@ -433,7 +433,7 @@ class Blowfish extends BlockCipher
                   $sb_2[$r >>  8 & 0xff]) +
                   $sb_3[$r       & 0xff]);
         }
-        return pack("N*", $r ^ $p[17], $l ^ $p[16]);
+        return pack('N*', $r ^ $p[17], $l ^ $p[16]);
     }
 
     /**
@@ -445,13 +445,13 @@ class Blowfish extends BlockCipher
      */
     protected function decryptBlock($in)
     {
-        $p = $this->bctx["p"];
-        $sb_0 = $this->bctx["sb"][0];
-        $sb_1 = $this->bctx["sb"][1];
-        $sb_2 = $this->bctx["sb"][2];
-        $sb_3 = $this->bctx["sb"][3];
+        $p = $this->bctx['p'];
+        $sb_0 = $this->bctx['sb'][0];
+        $sb_1 = $this->bctx['sb'][1];
+        $sb_2 = $this->bctx['sb'][2];
+        $sb_3 = $this->bctx['sb'][3];
 
-        $in = unpack("N*", $in);
+        $in = unpack('N*', $in);
         $l = $in[1];
         $r = $in[2];
 
@@ -466,7 +466,7 @@ class Blowfish extends BlockCipher
                   $sb_2[$r >>  8 & 0xff]) +
                   $sb_3[$r       & 0xff]);
         }
-        return pack("N*", $r ^ $p[0], $l ^ $p[1]);
+        return pack('N*', $r ^ $p[0], $l ^ $p[1]);
     }
 
     /**