added configuration for PHP Coding Standards Fixer, including its fixes, resolving #47

.gitattributes

@@ -8,4 +8,5 @@ tst/ export-ignore
 .gitattributes export-ignore
 .github export-ignore
 .gitignore export-ignore
+.php_cs export-ignore
 .travis.yml export-ignore

.php_cs

@@ -0,0 +1,23 @@
+<?php
+/**
+ * Configuration file for PHP Coding Standards Fixer (php-cs-fixer).
+ *
+ * On GitHub: https://github.com/FriendsOfPhp/php-cs-fixer
+ * More information: http://cs.sensiolabs.org/
+ */
+
+$finder = Symfony\CS\Finder\DefaultFinder::create()
+    ->in('lib')
+;
+
+return Symfony\CS\Config\Config::create()
+    ->level(Symfony\CS\FixerInterface::PSR2_LEVEL)
+    ->fixers(['concat_with_spaces', 'long_array_syntax', 'standardize_not_equal',
+              'operators_spaces', 'duplicate_semicolon',
+              'remove_leading_slash_use', 'align_equals',
+              'single_array_no_trailing_comma', 'phpdoc_indent', 'phpdoc_scalar',
+              'phpdoc_to_comment', 'phpdoc_trim',
+              'phpdoc_types', 'print_to_echo', 'self_accessor', 'single_quote',
+              'spaces_cast', 'ternary_spaces', 'phpdoc_order'])
+    ->finder($finder)
+;

lib/Data/Database.php

@@ -71,7 +71,7 @@ class Database extends AbstractData
     public static function getInstance($options = null)
     {
         // if needed initialize the singleton
-        if (!(self::$_instance instanceof Database)) {
+        if (!(self::$_instance instanceof self)) {
             self::$_instance = new self;
         }
 
@@ -486,7 +486,7 @@ class Database extends AbstractData
                 $sql = 'SELECT tabname FROM systables ';
                 break;
             case 'mssql':
-                $sql = "SELECT name FROM sysobjects "
+                $sql = 'SELECT name FROM sysobjects '
                      . "WHERE type = 'U' ORDER BY name";
                 break;
             case 'mysql':
@@ -496,22 +496,22 @@ class Database extends AbstractData
                 $sql = 'SELECT table_name FROM all_tables';
                 break;
             case 'pgsql':
-                $sql = "SELECT c.relname AS table_name "
-                     . "FROM pg_class c, pg_user u "
+                $sql = 'SELECT c.relname AS table_name '
+                     . 'FROM pg_class c, pg_user u '
                      . "WHERE c.relowner = u.usesysid AND c.relkind = 'r' "
-                     . "AND NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname) "
+                     . 'AND NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname) '
                      . "AND c.relname !~ '^(pg_|sql_)' "
-                     . "UNION "
-                     . "SELECT c.relname AS table_name "
-                     . "FROM pg_class c "
+                     . 'UNION '
+                     . 'SELECT c.relname AS table_name '
+                     . 'FROM pg_class c '
                      . "WHERE c.relkind = 'r' "
-                     . "AND NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname) "
-                     . "AND NOT EXISTS (SELECT 1 FROM pg_user WHERE usesysid = c.relowner) "
+                     . 'AND NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname) '
+                     . 'AND NOT EXISTS (SELECT 1 FROM pg_user WHERE usesysid = c.relowner) '
                      . "AND c.relname !~ '^pg_'";
                 break;
             case 'sqlite':
                 $sql = "SELECT name FROM sqlite_master WHERE type='table' "
-                     . "UNION ALL SELECT name FROM sqlite_temp_master "
+                     . 'UNION ALL SELECT name FROM sqlite_temp_master '
                      . "WHERE type='table' ORDER BY name";
                 break;
             default:

lib/Data/Filesystem.php

@@ -49,7 +49,7 @@ class Filesystem extends AbstractData
             self::$_dir = $options['dir'] . DIRECTORY_SEPARATOR;
         }
         // if needed initialize the singleton
-        if (!(self::$_instance instanceof Filesystem)) {
+        if (!(self::$_instance instanceof self)) {
             self::$_instance = new self;
             self::_init();
         }

lib/Model/Paste.php

@@ -296,7 +296,7 @@ class Paste extends AbstractModel
      *
      * @access public
      * @throws Exception
-     * @return boolean
+     * @return bool
      */
     public function isBurnafterreading()
     {
@@ -313,7 +313,7 @@ class Paste extends AbstractModel
      *
      * @access public
      * @throws Exception
-     * @return boolean
+     * @return bool
      */
     public function isOpendiscussion()
     {