diff --git a/action/migration.php b/action/migration.php
index ced2696..c107cac 100644
--- a/action/migration.php
+++ b/action/migration.php
@@ -162,22 +162,34 @@ class action_plugin_struct_migration extends DokuWiki_Action_Plugin
                     $colname = "col$colno";
                     // lookup fields pointing to pages have to be migrated first!
                     // they rely on a simplistic not-a-number check, and already migrated lookups pass the test!
-                    $f = 'UPDATE data_%s SET %s = \'["\'||%s||\'",0]\' WHERE %s != \'\' AND CAST(%s AS DECIMAL) != %s';
+                    $f = 'UPDATE data_%s
+                             SET %s = \'["\'||%s||\'",0]\'
+                           WHERE %s != \'\'
+                             AND CAST(%s AS DECIMAL) != %s';
                     $s = sprintf($f, $name, $colname, $colname, $colname, $colname, $colname);
                     $ok = $ok && $sqlite->query($s);
                     if (!$ok) return false;
                     // multi_
-                    $f = 'UPDATE multi_%s SET value = \'["\'||value||\'",0]\' WHERE colref = %s AND CAST(value AS DECIMAL) != value';
+                    $f = 'UPDATE multi_%s
+                             SET value = \'["\'||value||\'",0]\'
+                           WHERE colref = %s
+                             AND CAST(value AS DECIMAL) != value';
                     $s = sprintf($f, $name, $colno);
                     $ok = $ok && $sqlite->query($s);
                     if (!$ok) return false;
 
                     // simple lookup fields
-                    $s = "UPDATE data_$name SET col$colno = '[" . '""' . ",'||col$colno||']' WHERE col$colno != '' AND CAST(col$colno AS DECIMAL) = col$colno";
+                    $s = "UPDATE data_$name
+                             SET col$colno = '[" . '""' . ",'||col$colno||']' 
+                           WHERE col$colno != ''
+                             AND CAST(col$colno AS DECIMAL) = col$colno";
                     $ok = $ok && $sqlite->query($s);
                     if (!$ok) return false;
                     // multi_
-                    $s = "UPDATE multi_$name SET value = '[" . '""' . ",'||value||']' WHERE colref=$colno AND CAST(value AS DECIMAL) = value";
+                    $s = "UPDATE multi_$name
+                             SET value = '[" . '""' . ",'||value||']'
+                           WHERE colref=$colno
+                             AND CAST(value AS DECIMAL) = value";
                     $ok = $ok && $sqlite->query($s);
                     if (!$ok) return false;
                 }
@@ -264,7 +276,11 @@ class action_plugin_struct_migration extends DokuWiki_Action_Plugin
                         list($pid, $rid, $rev, $colref, $rowno, $fixes) = $this->getFixedValues($row);
                         // now fix the values
                         if (!empty($fixes)) {
-                            $sql = "UPDATE data_$name SET " . implode(', ', $fixes) . " WHERE pid = ? and rid = ? AND rev = ?";
+                            $sql = "UPDATE data_$name 
+                                       SET " . implode(', ', $fixes) . "
+                                     WHERE pid = ?
+                                       AND rid = ?
+                                       AND rev = ?";
                             $params = [$pid, $rid, $rev];
                             $ok = $ok && $sqlite->query($sql, $params);
                         }
@@ -281,7 +297,13 @@ class action_plugin_struct_migration extends DokuWiki_Action_Plugin
                         list($pid, $rid, $rev, $colref, $rowno, $fixes) = $this->getFixedValues($row);
                         // now fix the values
                         if (!empty($fixes)) {
-                            $sql = "UPDATE multi_$name SET " . implode(', ', $fixes) . " WHERE pid = ? AND rid = ? AND rev = ? AND colref = ? AND row = ?";
+                            $sql = "UPDATE multi_$name 
+                                       SET " . implode(', ', $fixes) . "
+                                     WHERE pid = ?
+                                       AND rid = ?
+                                       AND rev = ?
+                                       AND colref = ?
+                                       AND row = ?";
                             $params = [$pid, $rid, $rev, $colref, $rowno];
                             $ok = $ok && $sqlite->query($sql, $params);
                         }
diff --git a/action/output.php b/action/output.php
index d4cec3b..04a47d6 100644
--- a/action/output.php
+++ b/action/output.php
@@ -20,7 +20,7 @@ use dokuwiki\plugin\struct\meta\Schema;
  */
 class action_plugin_struct_output extends DokuWiki_Action_Plugin
 {
-    const DW2PDF_PLACEHOLDER_PREFIX = 'PLUGIN_STRUCT';
+    protected const DW2PDF_PLACEHOLDER_PREFIX = 'PLUGIN_STRUCT';
 
     /**
      * Registers a callback function for a given event
diff --git a/admin/assignments.php b/admin/assignments.php
index 9a9397d..988ead5 100644
--- a/admin/assignments.php
+++ b/admin/assignments.php
@@ -12,8 +12,6 @@ use dokuwiki\plugin\struct\meta\Assignments;
 use dokuwiki\plugin\struct\meta\Schema;
 use dokuwiki\plugin\struct\meta\StructException;
 
-if (!defined('DOKU_INC')) die();
-
 class admin_plugin_struct_assignments extends DokuWiki_Admin_Plugin
 {
     /**
diff --git a/admin/schemas.php b/admin/schemas.php
index 3d66be0..555fdfe 100644
--- a/admin/schemas.php
+++ b/admin/schemas.php
@@ -236,7 +236,10 @@ class admin_plugin_struct_schemas extends DokuWiki_Admin_Plugin
         $form->addElement(new \dokuwiki\Form\InputElement('file', 'csvfile'))->attr('accept', '.csv');
         $form->addButton('importcsv', $this->getLang('btn_import'));
         $form->addCheckbox('createPage', 'Create missing pages')->addClass('block edit');
-        $form->addHTML('<p><a href="https://www.dokuwiki.org/plugin:struct:csvimport">' . $this->getLang('admin_csvhelp') . '</a></p>');
+        $form->addHTML(
+            '<p><a href="https://www.dokuwiki.org/plugin:struct:csvimport">' .
+            $this->getLang('admin_csvhelp') . '</a></p>'
+        );
         $form->addFieldsetClose();
 
         return $form->toHTML();
diff --git a/helper.php b/helper.php
index c1d9fc2..faae0c3 100644
--- a/helper.php
+++ b/helper.php
@@ -30,7 +30,7 @@ class helper_plugin_struct extends DokuWiki_Plugin
      * Class names of renderers which should NOT render struct data.
      * All descendants are also blacklisted.
      */
-    const BLACKLIST_RENDERER = [
+    public const BLACKLIST_RENDERER = [
         'Doku_Renderer_metadata',
         '\renderer_plugin_qc'
     ];
diff --git a/meta/AccessTable.php b/meta/AccessTable.php
index 385321e..6f2188a 100644
--- a/meta/AccessTable.php
+++ b/meta/AccessTable.php
@@ -11,8 +11,8 @@ namespace dokuwiki\plugin\struct\meta;
  */
 abstract class AccessTable
 {
-    const DEFAULT_REV = 0;
-    const DEFAULT_LATEST = 1;
+    public const DEFAULT_REV = 0;
+    public const DEFAULT_LATEST = 1;
 
     /** @var  Schema */
     protected $schema;
diff --git a/meta/AccessTableGlobal.php b/meta/AccessTableGlobal.php
index 8b013c9..ea9295b 100644
--- a/meta/AccessTableGlobal.php
+++ b/meta/AccessTableGlobal.php
@@ -52,7 +52,8 @@ class AccessTableGlobal extends AccessTable
         $vals = array_merge($this->getSingleNoninputValues(), $this->singleValues);
         $rid = $this->getRid() ?: "(SELECT (COALESCE(MAX(rid), 0 ) + 1) FROM $this->stable)";
 
-        return "REPLACE INTO $this->stable (rid, $cols) VALUES ($rid," . trim(str_repeat('?,', count($vals)), ',') . ');';
+        return "REPLACE INTO $this->stable (rid, $cols) 
+                      VALUES ($rid," . trim(str_repeat('?,', count($vals)), ',') . ');';
     }
 
     /**
diff --git a/meta/AccessTablePage.php b/meta/AccessTablePage.php
index 8ee02c0..772f077 100644
--- a/meta/AccessTablePage.php
+++ b/meta/AccessTablePage.php
@@ -11,7 +11,7 @@ namespace dokuwiki\plugin\struct\meta;
  */
 class AccessTablePage extends AccessTable
 {
-    const DEFAULT_PAGE_RID = 0;
+    public const DEFAULT_PAGE_RID = 0;
 
     public function __construct($schema, $pid, $ts = 0, $rid = 0)
     {
diff --git a/meta/AggregationCloud.php b/meta/AggregationCloud.php
index 891f6d8..66e0a56 100644
--- a/meta/AggregationCloud.php
+++ b/meta/AggregationCloud.php
@@ -143,7 +143,8 @@ class AggregationCloud
         $this->renderer->listcontent_open();
 
         if ($this->mode == 'xhtml') {
-            $this->renderer->doc .= "<div style='font-size:$weight%' data-count='$count' class='cloudtag struct_$type'>";
+            $this->renderer->doc .=
+                "<div style='font-size:$weight%' data-count='$count' class='cloudtag struct_$type'>";
         }
 
         $value->renderAsTagCloudLink($this->renderer, $this->mode, $target, $filter, $weight);
diff --git a/meta/AggregationEditorTable.php b/meta/AggregationEditorTable.php
index 56f03ee..ff88761 100644
--- a/meta/AggregationEditorTable.php
+++ b/meta/AggregationEditorTable.php
@@ -37,7 +37,8 @@ class AggregationEditorTable extends AggregationTable
         $config = hsc(json_encode($config));
 
         // wrapping div
-        $this->renderer->doc .= "<div class=\"structaggregation structaggregationeditor\" data-schema=\"$table\" data-searchconf=\"$config\">";
+        $this->renderer->doc .= "<div class=\"structaggregation structaggregationeditor\" 
+                                      data-schema=\"$table\" data-searchconf=\"$config\">";
 
         // unique identifier for this aggregation
         $this->renderer->info['struct_table_hash'] = md5(var_export($this->data, true));
diff --git a/meta/AggregationTable.php b/meta/AggregationTable.php
index 1d5e33d..db31ebb 100644
--- a/meta/AggregationTable.php
+++ b/meta/AggregationTable.php
@@ -225,7 +225,12 @@ class AggregationTable
         }
 
         $this->renderer->doc .= '<div class="filter">';
-        $this->renderer->doc .= '<h4>' . sprintf($this->helper->getLang('tablefilteredby'), hsc(implode(' & ', $fltrs))) . '</h4>';
+        $this->renderer->doc .= '<h4>' .
+            sprintf(
+                $this->helper->getLang('tablefilteredby'),
+                hsc(implode(' & ', $fltrs))
+            ) .
+            '</h4>';
         $this->renderer->doc .= '<div class="resetfilter">';
         $this->renderer->internallink($this->id, $this->helper->getLang('tableresetfilter'));
         $this->renderer->doc .= '</div>';
@@ -307,7 +312,8 @@ class AggregationTable
 
             // output XHTML header
             $this->renderer->doc .= "<th $width $data>";
-            $this->renderer->doc .= '<a href="' . $link . '" class="' . $sortclass . '" title="' . $this->helper->getLang('sort') . '">' . hsc($header) . '</a>';
+            $this->renderer->doc .= '<a href="' . $link . '" class="' . $sortclass . '" ' .
+                'title="' . $this->helper->getLang('sort') . '">' . hsc($header) . '</a>';
             $this->renderer->doc .= '</th>';
         }
 
@@ -349,14 +355,15 @@ class AggregationTable
         // each column gets a form
         foreach ($this->columns as $column) {
             $this->renderer->doc .= '<th>';
-            {
-                $form = new \Doku_Form(array('method' => 'GET', 'action' => wl($this->id)));
-                unset($form->_hidden['sectok']); // we don't need it here
-                if (!$conf['userewrite']) $form->addHidden('id', $this->id);
 
-                // current value
-                $dynamic = $this->searchConfig->getDynamicParameters();
-                $filters = $dynamic->getFilters();
+            // BEGIN FORM
+            $form = new \Doku_Form(array('method' => 'GET', 'action' => wl($this->id)));
+            unset($form->_hidden['sectok']); // we don't need it here
+            if (!$conf['userewrite']) $form->addHidden('id', $this->id);
+
+            // current value
+            $dynamic = $this->searchConfig->getDynamicParameters();
+            $filters = $dynamic->getFilters();
             if (isset($filters[$column->getFullQualifiedLabel()])) {
                 list(, $current) = $filters[$column->getFullQualifiedLabel()];
                 $dynamic->removeFilter($column);
@@ -364,17 +371,20 @@ class AggregationTable
                 $current = '';
             }
 
-                // Add current request params
-                $params = $dynamic->getURLParameters();
+            // Add current request params
+            $params = $dynamic->getURLParameters();
             foreach ($params as $key => $val) {
                 $form->addHidden($key, $val);
             }
 
-                // add input field
-                $key = $column->getFullQualifiedLabel() . $column->getType()->getDefaultComparator();
-                $form->addElement(form_makeField('text', SearchConfigParameters::$PARAM_FILTER . '[' . $key . ']', $current, ''));
-                $this->renderer->doc .= $form->getForm();
-            }
+            // add input field
+            $key = $column->getFullQualifiedLabel() . $column->getType()->getDefaultComparator();
+            $form->addElement(
+                form_makeField('text', SearchConfigParameters::$PARAM_FILTER . '[' . $key . ']', $current, '')
+            );
+            $this->renderer->doc .= $form->getForm();
+            // END FORM
+
             $this->renderer->doc .= '</th>';
         }
         $this->renderer->doc .= '</tr>';
@@ -553,6 +563,7 @@ class AggregationTable
         // FIXME apply dynamic filters
         $link = exportlink($this->id, 'struct_csv', $params);
 
-        $this->renderer->doc .= '<a href="' . $link . '" class="export mediafile mf_csv">' . $this->helper->getLang('csvexport') . '</a>';
+        $this->renderer->doc .= '<a href="' . $link . '" class="export mediafile mf_csv">' .
+            $this->helper->getLang('csvexport') . '</a>';
     }
 }
diff --git a/meta/Assignments.php b/meta/Assignments.php
index 28bb330..01374d1 100644
--- a/meta/Assignments.php
+++ b/meta/Assignments.php
@@ -351,7 +351,8 @@ class Assignments
     }
 
     /**
-     * fetch all pages where the schema isn't assigned, yet and reevaluate the page assignments for those pages and assign when needed
+     * fetch all pages where the schema isn't assigned, yet
+     * and reevaluate the page assignments for those pages and assign when needed
      *
      * @param $table
      */
diff --git a/meta/CSVExporter.php b/meta/CSVExporter.php
index abd6b23..d457e00 100644
--- a/meta/CSVExporter.php
+++ b/meta/CSVExporter.php
@@ -13,9 +13,9 @@ namespace dokuwiki\plugin\struct\meta;
  */
 class CSVExporter
 {
-    const DATATYPE_PAGE = 'page';
-    const DATATYPE_GLOBAL = 'global';
-    const DATATYPE_SERIAL = 'serial';
+    public const DATATYPE_PAGE = 'page';
+    public const DATATYPE_GLOBAL = 'global';
+    public const DATATYPE_SERIAL = 'serial';
 
     protected $type = '';
 
diff --git a/meta/CSVPageImporter.php b/meta/CSVPageImporter.php
index 469b1ed..875aec4 100644
--- a/meta/CSVPageImporter.php
+++ b/meta/CSVPageImporter.php
@@ -15,7 +15,8 @@ class CSVPageImporter extends CSVImporter
     protected function readHeaders()
     {
         parent::readHeaders();
-        if (!in_array('pid', $this->header)) throw new StructException('There is no "pid" header in the CSV. Schema not imported.');
+        if (!in_array('pid', $this->header))
+            throw new StructException('There is no "pid" header in the CSV. Schema not imported.');
     }
 
     /**
diff --git a/meta/CSVSerialImporter.php b/meta/CSVSerialImporter.php
index 9a2273b..809449b 100644
--- a/meta/CSVSerialImporter.php
+++ b/meta/CSVSerialImporter.php
@@ -13,7 +13,8 @@ class CSVSerialImporter extends CSVImporter
     protected function readHeaders()
     {
         parent::readHeaders();
-        if (!in_array('pid', $this->header)) throw new StructException('There is no "pid" header in the CSV. Schema not imported.');
+        if (!in_array('pid', $this->header))
+            throw new StructException('There is no "pid" header in the CSV. Schema not imported.');
     }
 
     /**
diff --git a/meta/Column.php b/meta/Column.php
index 427b454..7993ce3 100644
--- a/meta/Column.php
+++ b/meta/Column.php
@@ -118,7 +118,8 @@ class Column
      */
     public function getColName($enforceSingleColumn = true)
     {
-        if ($enforceSingleColumn && $this->isMulti()) throw new StructException('Calling getColName on a multi value column makes no sense.');
+        if ($enforceSingleColumn && $this->isMulti())
+            throw new StructException('Calling getColName on a multi value column makes no sense.');
         return 'col' . $this->colref;
     }
 
diff --git a/meta/DateFormatConverter.php b/meta/DateFormatConverter.php
index a7133ef..d4afb86 100644
--- a/meta/DateFormatConverter.php
+++ b/meta/DateFormatConverter.php
@@ -1,5 +1,7 @@
 <?php
 
+// phpcs:disable Generic.Files.LineLength.TooLong
+
 namespace dokuwiki\plugin\struct\meta;
 
 /**
diff --git a/meta/PageMeta.php b/meta/PageMeta.php
index 7a349de..21d4bf5 100644
--- a/meta/PageMeta.php
+++ b/meta/PageMeta.php
@@ -51,7 +51,7 @@ class PageMeta
     public function savePageData()
     {
         $sql = "REPLACE INTO titles (pid, title, lasteditor, lastrev, lastsummary) VALUES (?,?,?,?,?)";
-        $this->sqlite->query($sql, array($this->pid, $this->title, $this->lasteditor, $this->lastrev, $this->lastsummary));
+        $this->sqlite->query($sql, [$this->pid, $this->title, $this->lasteditor, $this->lastrev, $this->lastsummary]);
         $this->saveNeeded = false;
     }
 
diff --git a/meta/Schema.php b/meta/Schema.php
index 3c79280..ab5d52c 100644
--- a/meta/Schema.php
+++ b/meta/Schema.php
@@ -4,8 +4,6 @@ namespace dokuwiki\plugin\struct\meta;
 
 use dokuwiki\plugin\struct\types\AbstractBaseType;
 
-if (!defined('JSON_PRETTY_PRINT')) define('JSON_PRETTY_PRINT', 0); // PHP 5.3 compatibility
-
 /**
  * Class Schema
  *
diff --git a/meta/SchemaBuilder.php b/meta/SchemaBuilder.php
index 21c0200..7470a14 100644
--- a/meta/SchemaBuilder.php
+++ b/meta/SchemaBuilder.php
@@ -170,7 +170,8 @@ class SchemaBuilder
             $newTid = $oldTid;
             $sort = $column->getSort();
             if (isset($this->data['cols'][$column->getColref()])) {
-                // todo I'm not too happy with this hardcoded here - we should probably have a list of fields at one place
+                // todo I'm not too happy with this hardcoded here -
+                // we should probably have a list of fields at one place
                 $newEntry['config'] = $this->data['cols'][$column->getColref()]['config'];
                 $newEntry['label'] = $this->data['cols'][$column->getColref()]['label'];
                 $newEntry['ismulti'] = $this->data['cols'][$column->getColref()]['ismulti'];
diff --git a/meta/SchemaEditor.php b/meta/SchemaEditor.php
index 6f819a4..6fa147b 100644
--- a/meta/SchemaEditor.php
+++ b/meta/SchemaEditor.php
@@ -5,8 +5,6 @@ namespace dokuwiki\plugin\struct\meta;
 use dokuwiki\Form\Form;
 use dokuwiki\plugin\struct\types\Text;
 
-if (!defined('JSON_PRETTY_PRINT')) define('JSON_PRETTY_PRINT', 0); // PHP 5.3 compatibility
-
 /**
  * Class SchemaEditor
  *
@@ -71,7 +69,11 @@ class SchemaEditor
 
         $form->addFieldsetOpen();
         $config = json_encode($this->schema->getConfig(), JSON_PRETTY_PRINT);
-        $form->addHTML('<textarea name="schema[config]" id="schemaConfig" cols="45" rows="10" class="config">' . hsc($config) . '</textarea>');
+        $form->addHTML(
+            '<textarea name="schema[config]" id="schemaConfig" cols="45" rows="10" class="config">' .
+            hsc($config) .
+            '</textarea>'
+        );
         $form->addFieldsetClose();
 
 
@@ -88,10 +90,14 @@ class SchemaEditor
     protected function initJSONEditor()
     {
         $html = '';
-        $html .= '<link href="' . DOKU_BASE . 'lib/plugins/struct/jsoneditor/jsoneditor.min.css" rel="stylesheet" type="text/css">';
-        $html .= '<link href="' . DOKU_BASE . 'lib/plugins/struct/jsoneditor/setup.css" rel="stylesheet" type="text/css">';
-        $html .= '<script src="' . DOKU_BASE . 'lib/plugins/struct/jsoneditor/jsoneditor-minimalist.min.js" defer="defer"></script>';
-        $html .= '<script src="' . DOKU_BASE . 'lib/plugins/struct/jsoneditor/setup.js" defer="defer"></script>';
+        $html .= '<link href="' . DOKU_BASE .
+            'lib/plugins/struct/jsoneditor/jsoneditor.min.css" rel="stylesheet" type="text/css">';
+        $html .= '<link href="' . DOKU_BASE .
+            'lib/plugins/struct/jsoneditor/setup.css" rel="stylesheet" type="text/css">';
+        $html .= '<script src="' . DOKU_BASE .
+            'lib/plugins/struct/jsoneditor/jsoneditor-minimalist.min.js" defer="defer"></script>';
+        $html .= '<script src="' . DOKU_BASE .
+            'lib/plugins/struct/jsoneditor/setup.js" defer="defer"></script>';
         return $html;
     }
 
@@ -127,7 +133,9 @@ class SchemaEditor
 
         $html .= '<td class="config">';
         $config = json_encode($col->getType()->getConfig(), JSON_PRETTY_PRINT);
-        $html .= '<textarea name="' . $base . '[config]" cols="45" rows="10" class="config">' . hsc($config) . '</textarea>';
+        $html .= '<textarea name="' . $base . '[config]" cols="45" rows="10" class="config">' .
+            hsc($config) .
+            '</textarea>';
         $html .= '</td>';
 
         $types = array_keys(Column::allTypes());
diff --git a/meta/SchemaImporter.php b/meta/SchemaImporter.php
index 05e9c8d..41e7b3b 100644
--- a/meta/SchemaImporter.php
+++ b/meta/SchemaImporter.php
@@ -2,8 +2,6 @@
 
 namespace dokuwiki\plugin\struct\meta;
 
-if (!defined('JSON_PRETTY_PRINT')) define('JSON_PRETTY_PRINT', 0); // PHP 5.3 compatibility
-
 /**
  * Class SchemaImporter
  *
diff --git a/meta/Search.php b/meta/Search.php
index f92579f..c1a66e3 100755
--- a/meta/Search.php
+++ b/meta/Search.php
@@ -13,7 +13,7 @@ class Search
     /**
      * This separator will be used to concat multi values to flatten them in the result set
      */
-    const CONCAT_SEPARATOR = "\n!_-_-_-_-_!\n";
+    public const CONCAT_SEPARATOR = "\n!_-_-_-_-_!\n";
 
     /**
      * The list of known and allowed comparators
@@ -156,8 +156,10 @@ class Search
             $comp = '!=';
         }
 
-        if (!in_array($comp, self::$COMPARATORS)) throw new StructException("Bad comperator. Use " . join(',', self::$COMPARATORS));
-        if ($op != 'OR' && $op != 'AND') throw new StructException('Bad filter type . Only AND or OR allowed');
+        if (!in_array($comp, self::$COMPARATORS))
+            throw new StructException("Bad comperator. Use " . join(',', self::$COMPARATORS));
+        if ($op != 'OR' && $op != 'AND')
+            throw new StructException('Bad filter type . Only AND or OR allowed');
 
         $col = $this->findColumn($colname);
         if (!$col) return; // ignore missing columns, filter might have been for different schema
@@ -323,7 +325,8 @@ class Search
      */
     public function getPids()
     {
-        if ($this->result_pids === null) throw new StructException('PIDs are only accessible after executing the search');
+        if ($this->result_pids === null)
+            throw new StructException('PIDs are only accessible after executing the search');
         return $this->result_pids;
     }
 
@@ -336,7 +339,8 @@ class Search
      */
     public function getRids()
     {
-        if ($this->result_rids === null) throw new StructException('rids are only accessible after executing the search');
+        if ($this->result_rids === null)
+            throw new StructException('rids are only accessible after executing the search');
         return $this->result_rids;
     }
 
@@ -349,7 +353,8 @@ class Search
      */
     public function getRevs()
     {
-        if ($this->result_revs === null) throw new StructException('revs are only accessible after executing the search');
+        if ($this->result_revs === null)
+            throw new StructException('revs are only accessible after executing the search');
         return $this->result_revs;
     }
 
diff --git a/meta/UserColumn.php b/meta/UserColumn.php
index 799c3ba..339a528 100644
--- a/meta/UserColumn.php
+++ b/meta/UserColumn.php
@@ -7,7 +7,8 @@ use dokuwiki\plugin\struct\types\User;
 /**
  * Class UserColumn
  *
- * Just like a column, but does not reference one of the col* data columns but the lasteditor column in the titles table.
+ * Just like a column, but does not reference one of the col* data columns
+ * but the lasteditor column in the titles table.
  *
  * @package dokuwiki\plugin\struct\meta
  */
diff --git a/remote.php b/remote.php
index 057559a..34aa292 100644
--- a/remote.php
+++ b/remote.php
@@ -12,9 +12,6 @@ use dokuwiki\plugin\struct\meta\ConfigParser;
 use dokuwiki\plugin\struct\meta\SearchConfig;
 use dokuwiki\plugin\struct\meta\StructException;
 
-if (!defined('DOKU_INC')) die();
-
-
 class remote_plugin_struct extends DokuWiki_Remote_Plugin
 {
     /** @var helper_plugin_struct hlp */
diff --git a/renderer/csv.php b/renderer/csv.php
index 05f3b7a..a1d68ef 100644
--- a/renderer/csv.php
+++ b/renderer/csv.php
@@ -1,5 +1,7 @@
 <?php
 
+// phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+
 /**
  * CSV export of tabular data generated in Aggregations
  *
@@ -48,7 +50,7 @@ class renderer_plugin_struct_csv extends Doku_Renderer
     /**
      * Set proper headers
      */
-    public function document_start() // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function document_start()
     {
         global $ID;
         $filename = noNS($ID) . '.csv';
@@ -64,7 +66,7 @@ class renderer_plugin_struct_csv extends Doku_Renderer
     /**
      * Opening a table row prevents the separator for the first following cell
      */
-    public function tablerow_open() // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function tablerow_open()
     {
         if (!$this->doOutput()) return;
         $this->first = true;
@@ -76,8 +78,9 @@ class renderer_plugin_struct_csv extends Doku_Renderer
      * @param int $colspan ignored
      * @param null $align ignored
      * @param int $rowspan ignored
+     *
      */
-    public function tablecell_open($colspan = 1, $align = null, $rowspan = 1) // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function tablecell_open($colspan = 1, $align = null, $rowspan = 1)
     {
         if (!$this->doOutput()) return;
         if (!$this->first) {
@@ -91,7 +94,7 @@ class renderer_plugin_struct_csv extends Doku_Renderer
     /**
      * Close the text wrapper
      */
-    public function tablecell_close() // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function tablecell_close()
     {
         if (!$this->doOutput()) return;
         $this->doc .= '"';
@@ -104,7 +107,7 @@ class renderer_plugin_struct_csv extends Doku_Renderer
      * @param null $align ignored
      * @param int $rowspan ignored
      */
-    public function tableheader_open($colspan = 1, $align = null, $rowspan = 1) // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function tableheader_open($colspan = 1, $align = null, $rowspan = 1)
     {
         $this->tablecell_open($colspan, $align, $rowspan);
     }
@@ -112,7 +115,7 @@ class renderer_plugin_struct_csv extends Doku_Renderer
     /**
      * Alias for tablecell_close
      */
-    public function tableheader_close() // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function tableheader_close()
     {
         $this->tablecell_close();
     }
@@ -120,7 +123,7 @@ class renderer_plugin_struct_csv extends Doku_Renderer
     /**
      * Add CRLF newline at the end of one line
      */
-    public function tablerow_close() // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+    public function tablerow_close()
     {
         if (!$this->doOutput()) return;
         $this->doc .= "\r\n";
diff --git a/syntax/global.php b/syntax/global.php
index 6ec7a3f..c492007 100644
--- a/syntax/global.php
+++ b/syntax/global.php
@@ -9,9 +9,6 @@
 
 use dokuwiki\plugin\struct\meta\AggregationEditorTable;
 
-// must be run within Dokuwiki
-if (!defined('DOKU_INC')) die();
-
 class syntax_plugin_struct_global extends syntax_plugin_struct_table
 {
     /** @var string which class to use for output */
@@ -59,7 +56,10 @@ class syntax_plugin_struct_global extends syntax_plugin_struct_table
      */
     protected function addTypeFilter($config)
     {
-        $config['filter'][] = ['%rowid%', '!=', (string)\dokuwiki\plugin\struct\meta\AccessTablePage::DEFAULT_PAGE_RID, 'AND'];
+        $config['filter'][] = [
+            '%rowid%', '!=',
+            (string)\dokuwiki\plugin\struct\meta\AccessTablePage::DEFAULT_PAGE_RID, 'AND'
+        ];
         $config['filter'][] = ['%pageid%', '=*', '^(?![\s\S])', 'AND'];
         $config['withpid'] = 0; // flag for the editor to distinguish data types
         return $config;
diff --git a/syntax/list.php b/syntax/list.php
index 46a7d79..6703243 100644
--- a/syntax/list.php
+++ b/syntax/list.php
@@ -12,9 +12,6 @@ use dokuwiki\plugin\struct\meta\ConfigParser;
 use dokuwiki\plugin\struct\meta\SearchConfig;
 use dokuwiki\plugin\struct\meta\StructException;
 
-// must be run within Dokuwiki
-if (!defined('DOKU_INC')) die();
-
 class syntax_plugin_struct_list extends DokuWiki_Syntax_Plugin
 {
     /** @var string which class to use for output */
diff --git a/syntax/output.php b/syntax/output.php
index da7abb8..1c2e565 100644
--- a/syntax/output.php
+++ b/syntax/output.php
@@ -15,13 +15,13 @@ class syntax_plugin_struct_output extends DokuWiki_Syntax_Plugin
 {
     protected $hasBeenRendered = false;
 
-    const XHTML_OPEN = '<div id="plugin__struct_output">';
-    const XHTML_CLOSE = '</div>';
+    protected const XHTML_OPEN = '<div id="plugin__struct_output">';
+    protected const XHTML_CLOSE = '</div>';
 
     /**
      * Regexp to check on which actions the struct data may be rendered
      */
-    const WHITELIST_ACTIONS = '/^(show|export_.*)$/';
+    protected const WHITELIST_ACTIONS = '/^(show|export_.*)$/';
 
     /**
      * @return string Syntax mode type
diff --git a/types/AbstractBaseType.php b/types/AbstractBaseType.php
index 257a61c..bc01919 100644
--- a/types/AbstractBaseType.php
+++ b/types/AbstractBaseType.php
@@ -201,8 +201,11 @@ abstract class AbstractBaseType
      */
     public function getContext()
     {
-        if (is_null($this->context))
-            throw new StructException('Empty column context requested. Type was probably initialized outside of Schema.');
+        if (is_null($this->context)) {
+            throw new StructException(
+                'Empty column context requested. Type was probably initialized outside of Schema.'
+            );
+        }
         return $this->context;
     }
 
@@ -345,7 +348,7 @@ abstract class AbstractBaseType
      * @param string $mode The mode the output is rendered in (eg. XHTML)
      * @param string $page the target to which should be linked
      * @param string $filter the filter to apply to the aggregations on $page
-     * @param int $weight the scaled weight of the item. Will already be implemented as css font-size on the outside container
+     * @param int $weight the scaled weight of the item. implemented as css font-size on the outside container
      */
     public function renderTagCloudLink($value, \Doku_Renderer $R, $mode, $page, $filter, $weight)
     {
diff --git a/types/Color.php b/types/Color.php
index e75dbb5..cf77846 100644
--- a/types/Color.php
+++ b/types/Color.php
@@ -34,7 +34,8 @@ class Color extends AbstractBaseType
     public function renderValue($value, \Doku_Renderer $R, $mode)
     {
         if ($mode == 'xhtml') {
-            $R->doc .= '<div title="' . hsc($value) . '" style="background-color:' . hsc($value) . ';" class="struct_color"></div>';
+            $R->doc .= '<div title="' . hsc($value) . '" style="background-color:' . hsc($value) . ';"
+                        class="struct_color"></div>';
         } else {
             $R->cdata($value);
         }
@@ -87,7 +88,9 @@ class Color extends AbstractBaseType
         if ($mode == 'xhtml') {
             $url = wl($page, $filter);
             $style = "background-color:$color;";
-            $R->doc .= "<a class='struct_color_tagcloud' href='$url' style='$style'><span class='a11y'>$color</span></a>";
+            $R->doc .= "<a class='struct_color_tagcloud' href='$url' style='$style'>
+                        <span class='a11y'>$color</span>
+                        </a>";
             return;
         }
         $R->internallink("$page?$filter", $color);
diff --git a/types/Lookup.php b/types/Lookup.php
index 03a0687..ef98bed 100644
--- a/types/Lookup.php
+++ b/types/Lookup.php
@@ -248,7 +248,8 @@ class Lookup extends Dropdown
             $tablealias,
             $schema,
             $rightalias,
-            "$tablealias.$colname = STRUCT_JSON($rightalias.pid, CAST($rightalias.rid AS DECIMAL)) AND $rightalias.latest = 1"
+            "$tablealias.$colname = STRUCT_JSON($rightalias.pid, CAST($rightalias.rid AS DECIMAL)) " .
+            "AND $rightalias.latest = 1"
         );
         $column->getType()->select($QB, $rightalias, $field, $alias);
         $sql = $QB->getSelectStatement($alias);
@@ -282,7 +283,8 @@ class Lookup extends Dropdown
             $tablealias,
             $schema,
             $rightalias,
-            "$tablealias.$colname = STRUCT_JSON($rightalias.pid, CAST($rightalias.rid AS DECIMAL)) AND $rightalias.latest = 1"
+            "$tablealias.$colname = STRUCT_JSON($rightalias.pid, CAST($rightalias.rid AS DECIMAL)) AND " .
+            "$rightalias.latest = 1"
         );
         $column->getType()->filter($add, $rightalias, $field, $comp, $value, $op);
     }
@@ -310,7 +312,8 @@ class Lookup extends Dropdown
             $tablealias,
             $schema,
             $rightalias,
-            "$tablealias.$colname = STRUCT_JSON($rightalias.pid, CAST($rightalias.rid AS DECIMAL)) AND $rightalias.latest = 1"
+            "$tablealias.$colname = STRUCT_JSON($rightalias.pid, CAST($rightalias.rid AS DECIMAL)) AND " .
+            "$rightalias.latest = 1"
         );
         $column->getType()->sort($QB, $rightalias, $field, $order);
     }
diff --git a/types/Media.php b/types/Media.php
index 3772cba..f4c2721 100644
--- a/types/Media.php
+++ b/types/Media.php
@@ -134,7 +134,8 @@ class Media extends AbstractBaseType
             $image = ml($media, ['h' => $weight, 'w' => $weight]);
             $media_escaped = hsc($media);
             $R->doc .= "<div style=\"height:{$weight}px; width:{$weight}px\">";
-            $R->doc .= "<a href='$url' class='struct_image' style='background-image:url(\"$image\")' title='$media_escaped'>";
+            $R->doc .= "<a href='$url' class='struct_image' style='background-image:url(\"$image\")' 
+                        title='$media_escaped'>";
             $R->doc .= "<span class='a11y'>$media_escaped</span>";
             $R->doc .= "</a>";
             $R->doc .= "</div>";
diff --git a/types/Tag.php b/types/Tag.php
index ecc9a54..51a3f79 100644
--- a/types/Tag.php
+++ b/types/Tag.php
@@ -26,7 +26,8 @@ class Tag extends AbstractMultiBaseType
     public function renderValue($value, \Doku_Renderer $R, $mode)
     {
         $context = $this->getContext();
-        $filter = SearchConfigParameters::$PARAM_FILTER . '[' . $context->getTable() . '.' . $context->getLabel() . '*~]=' . $value;
+        $filter = SearchConfigParameters::$PARAM_FILTER .
+            '[' . $context->getTable() . '.' . $context->getLabel() . '*~]=' . $value;
 
         $page = trim($this->config['page']);
         if (!$page) $page = cleanID($context->getLabel());