diff --git a/samples/Reader/01_Simple_file_reader_using_IOFactory.php b/samples/Reader/01_Simple_file_reader_using_IOFactory.php
index 622df2312..9a39d0f7c 100644
--- a/samples/Reader/01_Simple_file_reader_using_IOFactory.php
+++ b/samples/Reader/01_Simple_file_reader_using_IOFactory.php
@@ -7,5 +7,6 @@ require __DIR__ . '/../Header.php';
 $inputFileName = __DIR__ . '/sampleData/example1.xls';
 $helper->log('Loading file ' . /** @scrutinizer ignore-type */ pathinfo($inputFileName, PATHINFO_BASENAME) . ' using IOFactory to identify the format');
 $spreadsheet = IOFactory::load($inputFileName);
+
 $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/02_Simple_file_reader_using_a_specified_reader.php b/samples/Reader/02_Simple_file_reader_using_a_specified_reader.php
index 9d4ea6865..f6812f135 100644
--- a/samples/Reader/02_Simple_file_reader_using_a_specified_reader.php
+++ b/samples/Reader/02_Simple_file_reader_using_a_specified_reader.php
@@ -10,4 +10,4 @@ $reader = new Xls();
 $spreadsheet = $reader->load($inputFileName);
 
 $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/03_Simple_file_reader_using_the_IOFactory_to_return_a_reader.php b/samples/Reader/03_Simple_file_reader_using_the_IOFactory_to_return_a_reader.php
index 47b5264cd..b7fba6e64 100644
--- a/samples/Reader/03_Simple_file_reader_using_the_IOFactory_to_return_a_reader.php
+++ b/samples/Reader/03_Simple_file_reader_using_the_IOFactory_to_return_a_reader.php
@@ -12,4 +12,4 @@ $reader = IOFactory::createReader($inputFileType);
 $spreadsheet = $reader->load($inputFileName);
 
 $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/04_Simple_file_reader_using_the_IOFactory_to_identify_a_reader_to_use.php b/samples/Reader/04_Simple_file_reader_using_the_IOFactory_to_identify_a_reader_to_use.php
index 3a7dd0659..99f3583b4 100644
--- a/samples/Reader/04_Simple_file_reader_using_the_IOFactory_to_identify_a_reader_to_use.php
+++ b/samples/Reader/04_Simple_file_reader_using_the_IOFactory_to_identify_a_reader_to_use.php
@@ -14,4 +14,4 @@ $reader = IOFactory::createReader($inputFileType);
 $spreadsheet = $reader->load($inputFileName);
 
 $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/05_Simple_file_reader_using_the_read_data_only_option.php b/samples/Reader/05_Simple_file_reader_using_the_read_data_only_option.php
index 912040a12..9d26607e7 100644
--- a/samples/Reader/05_Simple_file_reader_using_the_read_data_only_option.php
+++ b/samples/Reader/05_Simple_file_reader_using_the_read_data_only_option.php
@@ -14,4 +14,4 @@ $reader->setReadDataOnly(true);
 $spreadsheet = $reader->load($inputFileName);
 
 $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/09_Simple_file_reader_using_a_read_filter.php b/samples/Reader/09_Simple_file_reader_using_a_read_filter.php
index 4603164c6..beea8d1e8 100644
--- a/samples/Reader/09_Simple_file_reader_using_a_read_filter.php
+++ b/samples/Reader/09_Simple_file_reader_using_a_read_filter.php
@@ -15,8 +15,8 @@ class MyReadFilter implements IReadFilter
 {
     public function readCell($columnAddress, $row, $worksheetName = '')
     {
-        // Read rows 1 to 7 and columns A to E only
-        if ($row >= 1 && $row <= 7) {
+        // Read rows 9 to 15 and columns A to E only
+        if ($row >= 9 && $row <= 15) {
             if (in_array($columnAddress, range('A', 'E'))) {
                 return true;
             }
@@ -29,6 +29,7 @@ class MyReadFilter implements IReadFilter
 $filterSubset = new MyReadFilter();
 
 $helper->log('Loading file ' . /** @scrutinizer ignore-type */ pathinfo($inputFileName, PATHINFO_BASENAME) . ' using IOFactory with a defined reader type of ' . $inputFileType);
+$helper->log('Filter range is A9:E15');
 $reader = IOFactory::createReader($inputFileType);
 $helper->log('Loading Sheet "' . $sheetname . '" only');
 $reader->setLoadSheetsOnly($sheetname);
@@ -36,5 +37,6 @@ $helper->log('Loading Sheet using filter');
 $reader->setReadFilter($filterSubset);
 $spreadsheet = $reader->load($inputFileName);
 
-$sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+$sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/10_Simple_file_reader_using_a_configurable_read_filter.php b/samples/Reader/10_Simple_file_reader_using_a_configurable_read_filter.php
index 82ca22349..b5fecbff6 100644
--- a/samples/Reader/10_Simple_file_reader_using_a_configurable_read_filter.php
+++ b/samples/Reader/10_Simple_file_reader_using_a_configurable_read_filter.php
@@ -41,6 +41,7 @@ class MyReadFilter implements IReadFilter
 $filterSubset = new MyReadFilter(9, 15, range('G', 'K'));
 
 $helper->log('Loading file ' . /** @scrutinizer ignore-type */ pathinfo($inputFileName, PATHINFO_BASENAME) . ' using IOFactory with a defined reader type of ' . $inputFileType);
+$helper->log('Filter range is G9:K15');
 $reader = IOFactory::createReader($inputFileType);
 $helper->log('Loading Sheet "' . $sheetname . '" only');
 $reader->setLoadSheetsOnly($sheetname);
@@ -48,5 +49,6 @@ $helper->log('Loading Sheet using configurable filter');
 $reader->setReadFilter($filterSubset);
 $spreadsheet = $reader->load($inputFileName);
 
-$sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-var_dump($sheetData);
+$activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+$sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+$helper->displayGrid($sheetData);
diff --git a/samples/Reader/11_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_1).php b/samples/Reader/11_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_1).php
index cf070054b..d3de92e74 100644
--- a/samples/Reader/11_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_1).php
+++ b/samples/Reader/11_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_1).php
@@ -59,6 +59,7 @@ for ($startRow = 2; $startRow <= 240; $startRow += $chunkSize) {
 
     // Do some processing here
 
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-    var_dump($sheetData);
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
diff --git a/samples/Reader/12_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_2).php b/samples/Reader/12_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_2).php
index 13692e3aa..8c023ca45 100644
--- a/samples/Reader/12_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_2).php
+++ b/samples/Reader/12_Reading_a_workbook_in_chunks_using_a_configurable_read_filter_(version_2).php
@@ -62,6 +62,7 @@ for ($startRow = 2; $startRow <= 240; $startRow += $chunkSize) {
 
     // Do some processing here
 
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-    var_dump($sheetData);
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
diff --git a/samples/Reader/13_Simple_file_reader_for_multiple_CSV_files.php b/samples/Reader/13_Simple_file_reader_for_multiple_CSV_files.php
index 9cba25a2d..9435f9721 100644
--- a/samples/Reader/13_Simple_file_reader_for_multiple_CSV_files.php
+++ b/samples/Reader/13_Simple_file_reader_for_multiple_CSV_files.php
@@ -23,6 +23,8 @@ $loadedSheetNames = $spreadsheet->getSheetNames();
 foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
     $helper->log('<b>Worksheet #' . $sheetIndex . ' -> ' . $loadedSheetName . '</b>');
     $spreadsheet->setActiveSheetIndexByName($loadedSheetName);
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-    var_dump($sheetData);
+
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
diff --git a/samples/Reader/14_Reading_a_large_CSV_file_in_chunks_to_split_across_multiple_worksheets.php b/samples/Reader/14_Reading_a_large_CSV_file_in_chunks_to_split_across_multiple_worksheets.php
index eab7ec01d..f33a9b486 100644
--- a/samples/Reader/14_Reading_a_large_CSV_file_in_chunks_to_split_across_multiple_worksheets.php
+++ b/samples/Reader/14_Reading_a_large_CSV_file_in_chunks_to_split_across_multiple_worksheets.php
@@ -80,6 +80,8 @@ $loadedSheetNames = $spreadsheet->getSheetNames();
 foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
     $helper->log('<b>Worksheet #' . $sheetIndex . ' -> ' . $loadedSheetName . '</b>');
     $spreadsheet->setActiveSheetIndexByName($loadedSheetName);
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, false, false, true);
-    var_dump($sheetData);
+
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
diff --git a/samples/Reader/15_Simple_file_reader_for_tab_separated_value_file_using_the_Advanced_Value_Binder.php b/samples/Reader/15_Simple_file_reader_for_tab_separated_value_file_using_the_Advanced_Value_Binder.php
index 848452c75..2f63fd0de 100644
--- a/samples/Reader/15_Simple_file_reader_for_tab_separated_value_file_using_the_Advanced_Value_Binder.php
+++ b/samples/Reader/15_Simple_file_reader_for_tab_separated_value_file_using_the_Advanced_Value_Binder.php
@@ -21,20 +21,26 @@ $loadedSheetNames = $spreadsheet->getSheetNames();
 foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
     $helper->log('<b>Worksheet #' . $sheetIndex . ' -> ' . $loadedSheetName . ' (Formatted)</b>');
     $spreadsheet->setActiveSheetIndexByName($loadedSheetName);
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-    var_dump($sheetData);
+
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
 
 foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
     $helper->log('<b>Worksheet #' . $sheetIndex . ' -> ' . $loadedSheetName . ' (Unformatted)</b>');
     $spreadsheet->setActiveSheetIndexByName($loadedSheetName);
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, false, true);
-    var_dump($sheetData);
+
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
 
 foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
     $helper->log('<b>Worksheet #' . $sheetIndex . ' -> ' . $loadedSheetName . ' (Raw)</b>');
     $spreadsheet->setActiveSheetIndexByName($loadedSheetName);
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, false, false, true);
-    var_dump($sheetData);
+
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
diff --git a/samples/Reader/21_Reader_CSV_Long_Integers_with_String_Value_Binder.php b/samples/Reader/21_Reader_CSV_Long_Integers_with_String_Value_Binder.php
index ec37b39a6..34d99d0ac 100644
--- a/samples/Reader/21_Reader_CSV_Long_Integers_with_String_Value_Binder.php
+++ b/samples/Reader/21_Reader_CSV_Long_Integers_with_String_Value_Binder.php
@@ -22,6 +22,8 @@ $loadedSheetNames = $spreadsheet->getSheetNames();
 foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
     $helper->log('<b>Worksheet #' . $sheetIndex . ' -> ' . $loadedSheetName . ' (Formatted)</b>');
     $spreadsheet->setActiveSheetIndexByName($loadedSheetName);
-    $sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);
-    var_dump($sheetData);
+
+    $activeRange = $spreadsheet->getActiveSheet()->calculateWorksheetDataDimension();
+    $sheetData = $spreadsheet->getActiveSheet()->rangeToArray($activeRange, null, true, true, true);
+    $helper->displayGrid($sheetData);
 }
diff --git a/samples/Reader/sampleData/example1.xls b/samples/Reader/sampleData/example1.xls
index bd9bb110b..5f7eb47a4 100644
Binary files a/samples/Reader/sampleData/example1.xls and b/samples/Reader/sampleData/example1.xls differ
diff --git a/src/PhpSpreadsheet/Helper/TextGrid.php b/src/PhpSpreadsheet/Helper/TextGrid.php
index f4ed63765..3a4a98f02 100644
--- a/src/PhpSpreadsheet/Helper/TextGrid.php
+++ b/src/PhpSpreadsheet/Helper/TextGrid.php
@@ -51,7 +51,7 @@ class TextGrid
         $this->gridDisplay = $this->isCli ? '' : '<pre>';
 
         $maxRow = max($this->rows);
-        $maxRowLength = strlen((string) $maxRow) + 1;
+        $maxRowLength = mb_strlen((string) $maxRow) + 1;
         $columnWidths = $this->getColumnWidths();
 
         $this->renderColumnHeader($maxRowLength, $columnWidths);
@@ -75,9 +75,9 @@ class TextGrid
     private function renderCells(array $rowData, array $columnWidths): void
     {
         foreach ($rowData as $column => $cell) {
-            $cell = ($this->isCli) ? (string) $cell : htmlentities((string) $cell);
+            $displayCell = ($this->isCli) ? (string) $cell : htmlentities((string) $cell);
             $this->gridDisplay .= '| ';
-            $this->gridDisplay .= str_pad($cell, $columnWidths[$column] + 1, ' ');
+            $this->gridDisplay .= $displayCell . str_repeat(' ', $columnWidths[$column] - mb_strlen($cell ?? '') + 1);
         }
     }
 
@@ -126,12 +126,12 @@ class TextGrid
 
         foreach ($columnData as $columnValue) {
             if (is_string($columnValue)) {
-                $columnWidth = max($columnWidth, strlen($columnValue));
+                $columnWidth = max($columnWidth, mb_strlen($columnValue));
             } elseif (is_bool($columnValue)) {
-                $columnWidth = max($columnWidth, strlen($columnValue ? 'TRUE' : 'FALSE'));
+                $columnWidth = max($columnWidth, mb_strlen($columnValue ? 'TRUE' : 'FALSE'));
             }
 
-            $columnWidth = max($columnWidth, strlen((string) $columnWidth));
+            $columnWidth = max($columnWidth, mb_strlen((string) $columnWidth));
         }
 
         return $columnWidth;