diff --git a/samples/DefinedNames/AbsoluteNamedRange.php b/samples/DefinedNames/AbsoluteNamedRange.php
index 450de667..30afc00d 100644
--- a/samples/DefinedNames/AbsoluteNamedRange.php
+++ b/samples/DefinedNames/AbsoluteNamedRange.php
@@ -1,16 +1,9 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -51,13 +44,11 @@ $worksheet
     ->setCellValue("B{$row}", "=SUM(B{$startRow}:B{$endRow})")
     ->setCellValue("C{$row}", "=SUM(C{$startRow}:C{$endRow})");
 
-echo sprintf(
+$helper->log(sprintf(
     'Worked %.2f hours at a rate of %.2f - Charge to the client is %.2f',
     $worksheet->getCell("B{$row}")->getCalculatedValue(),
     $worksheet->getCell('B1')->getValue(),
     $worksheet->getCell("C{$row}")->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'AbsoluteNamedRange.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/CrossWorksheetNamedFormula.php b/samples/DefinedNames/CrossWorksheetNamedFormula.php
index b441e0f7..5ce76516 100644
--- a/samples/DefinedNames/CrossWorksheetNamedFormula.php
+++ b/samples/DefinedNames/CrossWorksheetNamedFormula.php
@@ -1,18 +1,11 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedFormula;
 use PhpOffice\PhpSpreadsheet\Shared\Date;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 
@@ -91,9 +84,7 @@ for ($row = 2; $row <= 7; ++$row) {
     $growth = $worksheet->getCell("B{$row}")->getFormattedValue();
     $profitGrowth = $worksheet->getCell("C{$row}")->getFormattedValue();
 
-    echo "Growth for {$month} is {$growth}, with a Profit Growth of {$profitGrowth}", PHP_EOL;
+    $helper->log("Growth for {$month} is {$growth}, with a Profit Growth of {$profitGrowth}");
 }
 
-$outputFileName = 'CrossWorksheetNamedFormula.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/NamedFormulaeAndRanges.php b/samples/DefinedNames/NamedFormulaeAndRanges.php
index b3f94efc..a5ca80e7 100644
--- a/samples/DefinedNames/NamedFormulaeAndRanges.php
+++ b/samples/DefinedNames/NamedFormulaeAndRanges.php
@@ -1,17 +1,10 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedFormula;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -62,13 +55,11 @@ $worksheet
     ->setCellValue("B{$row}", '=COLUMN_TOTALS')
     ->setCellValue("C{$row}", '=COLUMN_TOTALS');
 
-echo sprintf(
+$helper->log(sprintf(
     'Worked %.2f hours at a rate of %.2f - Charge to the client is %.2f',
     $worksheet->getCell("B{$row}")->getCalculatedValue(),
     $worksheet->getCell('B1')->getValue(),
     $worksheet->getCell("C{$row}")->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'NamedFormulaeAndRanges.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/RelativeNamedRange.php b/samples/DefinedNames/RelativeNamedRange.php
index 1f712017..fac75a47 100644
--- a/samples/DefinedNames/RelativeNamedRange.php
+++ b/samples/DefinedNames/RelativeNamedRange.php
@@ -1,16 +1,9 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -54,13 +47,11 @@ $worksheet
     ->setCellValue("B{$row}", "=SUM(B{$startRow}:B{$endRow})")
     ->setCellValue("C{$row}", "=SUM(C{$startRow}:C{$endRow})");
 
-echo sprintf(
+$helper->log(sprintf(
     'Worked %.2f hours at a rate of %.2f - Charge to the client is %.2f',
     $worksheet->getCell("B{$row}")->getCalculatedValue(),
     $worksheet->getCell('B1')->getValue(),
     $worksheet->getCell("C{$row}")->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'RelativeNamedRange.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/RelativeNamedRange2.php b/samples/DefinedNames/RelativeNamedRange2.php
index b6a6f8d1..b3e957fd 100644
--- a/samples/DefinedNames/RelativeNamedRange2.php
+++ b/samples/DefinedNames/RelativeNamedRange2.php
@@ -1,16 +1,9 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -57,13 +50,11 @@ $worksheet
     ->setCellValue("B{$row}", '=SUM(COLUMN_DATA_VALUES)')
     ->setCellValue("C{$row}", '=SUM(COLUMN_DATA_VALUES)');
 
-echo sprintf(
+$helper->log(sprintf(
     'Worked %.2f hours at a rate of %.2f - Charge to the client is %.2f',
     $worksheet->getCell("B{$row}")->getCalculatedValue(),
     $worksheet->getCell('B1')->getValue(),
     $worksheet->getCell("C{$row}")->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'RelativeNamedRange2.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/RelativeNamedRangeAsFunction.php b/samples/DefinedNames/RelativeNamedRangeAsFunction.php
index 527cd43b..333d01ab 100644
--- a/samples/DefinedNames/RelativeNamedRangeAsFunction.php
+++ b/samples/DefinedNames/RelativeNamedRangeAsFunction.php
@@ -1,17 +1,10 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedFormula;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -60,13 +53,11 @@ $worksheet
     ->setCellValue("B{$row}", '=SUM(COLUMN_DATA_VALUES)')
     ->setCellValue("C{$row}", '=SUM(COLUMN_DATA_VALUES)');
 
-echo sprintf(
+$helper->log(sprintf(
     'Worked %.2f hours at a rate of %.2f - Charge to the client is %.2f',
     $worksheet->getCell("B{$row}")->getCalculatedValue(),
     $worksheet->getCell('B1')->getValue(),
     $worksheet->getCell("C{$row}")->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'RelativeNamedRangeAsFunction.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/ScopedNamedRange.php b/samples/DefinedNames/ScopedNamedRange.php
index 5ea7e48a..aa71454d 100644
--- a/samples/DefinedNames/ScopedNamedRange.php
+++ b/samples/DefinedNames/ScopedNamedRange.php
@@ -1,16 +1,9 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -67,15 +60,13 @@ $worksheet
     ->setCellValue("B{$row}", '=SUM(COLUMN_DATA_VALUES)')
     ->setCellValue("C{$row}", '=SUM(COLUMN_DATA_VALUES)');
 
-echo sprintf(
+$helper->log(sprintf(
     'Worked %.2f hours at a rate of %s - Charge to the client is %.2f',
     $worksheet->getCell("B{$row}")->getCalculatedValue(),
     $chargeRateCellValue = $spreadsheet
         ->getSheetByName($spreadsheet->getNamedRange('CHARGE_RATE')->getWorksheet()->getTitle())
         ->getCell($spreadsheet->getNamedRange('CHARGE_RATE')->getCellsInRange()[0])->getValue(),
     $worksheet->getCell("C{$row}")->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'ScopedNamedRange.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/ScopedNamedRange2.php b/samples/DefinedNames/ScopedNamedRange2.php
index 8e610418..5f0898c9 100644
--- a/samples/DefinedNames/ScopedNamedRange2.php
+++ b/samples/DefinedNames/ScopedNamedRange2.php
@@ -1,16 +1,9 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -83,16 +76,14 @@ $worksheet
     ->setCellValue('B1', 4.5);
 
 foreach ($spreadsheet->getAllSheets() as $worksheet) {
-    echo sprintf(
+    $helper->log(sprintf(
         'Worked %.2f hours for "%s" at a rate of %.2f - Charge to the client is %.2f',
         $worksheet->getCell("B{$row}")->getCalculatedValue(),
         $worksheet->getTitle(),
         $worksheet->getCell('B1')->getValue(),
         $worksheet->getCell("C{$row}")->getCalculatedValue()
-    ), PHP_EOL;
+    ));
 }
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
 
-$outputFileName = 'ScopedNamedRange2.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/SimpleNamedFormula.php b/samples/DefinedNames/SimpleNamedFormula.php
index 8e0fc972..ea1f802d 100644
--- a/samples/DefinedNames/SimpleNamedFormula.php
+++ b/samples/DefinedNames/SimpleNamedFormula.php
@@ -1,17 +1,10 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedFormula;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -39,14 +32,12 @@ $worksheet
     ->setCellValue('B4', '=TAX')
     ->setCellValue('B5', '=PRICE+TAX');
 
-echo sprintf(
+$helper->log(sprintf(
     'With a Tax Rate of %.2f and a net price of %.2f, Tax is %.2f and the gross price is %.2f',
     $worksheet->getCell('B1')->getCalculatedValue(),
     $worksheet->getCell('B3')->getValue(),
     $worksheet->getCell('B4')->getCalculatedValue(),
     $worksheet->getCell('B5')->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'SimpleNamedFormula.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);
diff --git a/samples/DefinedNames/SimpleNamedRange.php b/samples/DefinedNames/SimpleNamedRange.php
index ee05c68f..7a7cdc94 100644
--- a/samples/DefinedNames/SimpleNamedRange.php
+++ b/samples/DefinedNames/SimpleNamedRange.php
@@ -1,16 +1,9 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
-error_reporting(E_ALL);
-set_time_limit(0);
-
-date_default_timezone_set('UTC');
-
-// Adjust the path as required to reference the PHPSpreadsheet Bootstrap file
-require_once __DIR__ . '/../Bootstrap.php';
+require_once __DIR__ . '/../Header.php';
 
 $spreadsheet = new Spreadsheet();
 $worksheet = $spreadsheet->setActiveSheetIndex(0);
@@ -33,14 +26,12 @@ $worksheet
     ->setCellValue('B4', '=PRICE*TAX_RATE')
     ->setCellValue('B5', '=PRICE*(1+TAX_RATE)');
 
-echo sprintf(
+$helper->log(sprintf(
     'With a Tax Rate of %.2f and a net price of %.2f, Tax is %.2f and the gross price is %.2f',
     $worksheet->getCell('B1')->getCalculatedValue(),
     $worksheet->getCell('B3')->getValue(),
     $worksheet->getCell('B4')->getCalculatedValue(),
     $worksheet->getCell('B5')->getCalculatedValue()
-), PHP_EOL;
+));
 
-$outputFileName = 'SimpleNamedRange.xlsx';
-$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
-$writer->save($outputFileName);
+$helper->write($spreadsheet, __FILE__, ['Xlsx']);