diff --git a/libraries/Advisor.php b/libraries/Advisor.php
index dc467f9b4b..b83a93144d 100644
--- a/libraries/Advisor.php
+++ b/libraries/Advisor.php
@@ -24,6 +24,8 @@ class Advisor
     protected $runResult;
 
     /**
+     * Get variables
+     *
      * @return mixed
      */
     public function getVariables()
@@ -32,7 +34,9 @@ class Advisor
     }
 
     /**
-     * @param mixed $variables
+     * Set variables
+     *
+     * @param array $variables Variables
      *
      * @return Advisor
      */
@@ -43,13 +47,24 @@ class Advisor
         return $this;
     }
 
-    public function setVariable($variable, $value) {
+    /**
+     * Set a variable and its value
+     *
+     * @param string|int $variable Variable to set
+     * @param mixed      $value    Value to set
+     *
+     * @return $this
+     */
+    public function setVariable($variable, $value)
+    {
         $this->variables[$variable] = $value;
 
         return $this;
     }
 
     /**
+     * Get parseResult
+     *
      * @return mixed
      */
     public function getParseResult()
@@ -58,7 +73,9 @@ class Advisor
     }
 
     /**
-     * @param mixed $parseResult
+     * Set parseResult
+     *
+     * @param array $parseResult Parse result
      *
      * @return Advisor
      */
@@ -70,6 +87,8 @@ class Advisor
     }
 
     /**
+     * Get runResult
+     *
      * @return mixed
      */
     public function getRunResult()
@@ -78,7 +97,9 @@ class Advisor
     }
 
     /**
-     * @param mixed $runResult
+     * Set runResult
+     *
+     * @param array $runResult Run result
      *
      * @return Advisor
      */
@@ -114,7 +135,7 @@ class Advisor
             = isset($memory['MemTotal']) ? $memory['MemTotal'] : 0;
 
         // Step 2: Read and parse the list of rules
-        $this->setParseResult($this->parseRulesFile());
+        $this->setParseResult(static::parseRulesFile());
         // Step 3: Feed the variables to the rules and let them fire. Sets
         // $runResult
         $this->runRules();
@@ -511,7 +532,7 @@ class Advisor
                     /*overload*/mb_substr($line, 1)
                 );
                 $lines[$ruleNo][$ruleSyntax[$ruleLine]] = $i + 1;
-                $ruleLine += 1;
+                ++$ruleLine;
             }
 
             // Rule complete
diff --git a/libraries/Console.php b/libraries/Console.php
index 0d01d9c848..fff3034e98 100644
--- a/libraries/Console.php
+++ b/libraries/Console.php
@@ -339,7 +339,7 @@ class Console
                         . __('Add') . '</span></div>';
 
                 $output .= '</div><div class="content bookmark">';
-                $output .= $this->getBookmarkContent();
+                $output .= static::getBookmarkContent();
                 $output .= '</div>';
                     $output .= '<div class="mid_layer"></div>';
                     $output .= '<div class="card add">';
diff --git a/libraries/Util.php b/libraries/Util.php
index 7397bcf1bf..678a8d9b9d 100644
--- a/libraries/Util.php
+++ b/libraries/Util.php
@@ -3078,10 +3078,10 @@ class Util
             $i = 0;
             $printable = '';
             while ($value >= pow(2, $i)) {
-                $i++;
+                ++$i;
             }
             if ($i != 0) {
-                $i = $i - 1;
+                --$i;
             }
 
             while ($i >= 0) {
@@ -3091,7 +3091,7 @@ class Util
                     $printable = '1' . $printable;
                     $value = $value - pow(2, $i);
                 }
-                $i--;
+                --$i;
             }
             $printable = strrev($printable);
         }
diff --git a/libraries/di/FactoryItem.php b/libraries/di/FactoryItem.php
index eec0c0c0a4..b79ab294f8 100644
--- a/libraries/di/FactoryItem.php
+++ b/libraries/di/FactoryItem.php
@@ -15,17 +15,6 @@ namespace PMA\libraries\di;
 class FactoryItem extends ReflectorItem
 {
 
-    /**
-     * Constructor
-     *
-     * @param Container $container  Container
-     * @param mixed     $definition Definition
-     */
-    public function __construct(Container $container, $definition)
-    {
-        parent::__construct($container, $definition);
-    }
-
     /**
      * Construct an instance
      *
diff --git a/libraries/di/ServiceItem.php b/libraries/di/ServiceItem.php
index d3c644667f..e834dd6bc5 100644
--- a/libraries/di/ServiceItem.php
+++ b/libraries/di/ServiceItem.php
@@ -18,17 +18,6 @@ class ServiceItem extends ReflectorItem
     /** @var mixed */
     protected $instance;
 
-    /**
-     * Constructor
-     *
-     * @param Container $container  Container
-     * @param mixed     $definition Definition
-     */
-    public function __construct(Container $container, $definition)
-    {
-        parent::__construct($container, $definition);
-    }
-
     /**
      * Get the instance of the service
      *
diff --git a/libraries/ip_allow_deny.lib.php b/libraries/ip_allow_deny.lib.php
index d08e4271de..afd703f27a 100644
--- a/libraries/ip_allow_deny.lib.php
+++ b/libraries/ip_allow_deny.lib.php
@@ -248,7 +248,7 @@ function PMA_ipv6MaskTest($test_range, $ip_to_test)
 
             // We processed one nibble, move to previous position
             $flexbits -= 4;
-            $pos -= 1;
+            --$pos;
         }
 
         // check if the IP to test is within the range
diff --git a/libraries/plugins/import/ImportMediawiki.php b/libraries/plugins/import/ImportMediawiki.php
index 2d2ac46215..9af670bfeb 100644
--- a/libraries/plugins/import/ImportMediawiki.php
+++ b/libraries/plugins/import/ImportMediawiki.php
@@ -129,9 +129,8 @@ class ImportMediawiki extends ImportPlugin
             $full_buffer_lines_count = count($buffer_lines);
             // If the reading is not finalised, the final line of the current chunk
             // will not be complete
-            if (!$finished) {
-                $full_buffer_lines_count -= 1;
-                $last_chunk_line = $buffer_lines[$full_buffer_lines_count];
+            if (! $finished) {
+                $last_chunk_line = $buffer_lines[--$full_buffer_lines_count];
             }
 
             for ($line_nr = 0; $line_nr < $full_buffer_lines_count; ++$line_nr) {
diff --git a/libraries/plugins/schema/dia/RelationStatsDia.php b/libraries/plugins/schema/dia/RelationStatsDia.php
index 28b219acdb..f5a52a06b8 100644
--- a/libraries/plugins/schema/dia/RelationStatsDia.php
+++ b/libraries/plugins/schema/dia/RelationStatsDia.php
@@ -113,7 +113,7 @@ class RelationStatsDia
      */
     public function relationDraw($showColor)
     {
-        DiaRelationSchema::$objectId += 1;
+        ++DiaRelationSchema::$objectId;
         /*
          * if source connection points and destination connection
         * points are same then return it false and don't draw that
diff --git a/libraries/plugins/schema/dia/TableStatsDia.php b/libraries/plugins/schema/dia/TableStatsDia.php
index 5f197cc6ee..a319716950 100644
--- a/libraries/plugins/schema/dia/TableStatsDia.php
+++ b/libraries/plugins/schema/dia/TableStatsDia.php
@@ -61,9 +61,8 @@ class TableStatsDia extends TableStats
         /**
          * Every object in Dia document needs an ID to identify
          * so, we used a static variable to keep the things unique
-         */
-        DiaRelationSchema::$objectId += 1;
-        $this->tableId = DiaRelationSchema::$objectId;
+        */
+        $this->tableId = ++DiaRelationSchema::$objectId;
     }
 
     /**