Drop support for PclZip

Over the years PclZip became a maintenance problem. It's code base
is old and the official project seems to have died out. ZipArchive
is now more commonly available and offer an easier and more complete
API. So PclZip was dropped in order to focus our efforts on what matters.

Closes #18

samples/01_Simple_PCLZip.php

@@ -1,50 +0,0 @@
-<?php
-
-require __DIR__ . '/Header.php';
-
-// Create new Spreadsheet object
-$helper->log('Create new Spreadsheet object');
-$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
-
-// Set document properties
-$helper->log('Set document properties');
-$spreadsheet->getProperties()->setCreator('Maarten Balliauw')
-        ->setLastModifiedBy('Maarten Balliauw')
-        ->setTitle('PhpSpreadsheet Test Document')
-        ->setSubject('PhpSpreadsheet Test Document')
-        ->setDescription('Test document for PhpSpreadsheet, generated using PHP classes.')
-        ->setKeywords('office PhpSpreadsheet php')
-        ->setCategory('Test result file');
-
-// Add some data
-$helper->log('Add some data');
-$spreadsheet->setActiveSheetIndex(0)
-        ->setCellValue('A1', 'Hello')
-        ->setCellValue('B2', 'world!')
-        ->setCellValue('C1', 'Hello')
-        ->setCellValue('D2', 'world!');
-
-// Miscellaneous glyphs, UTF-8
-$spreadsheet->setActiveSheetIndex(0)
-        ->setCellValue('A4', 'Miscellaneous glyphs')
-        ->setCellValue('A5', 'éàèùâêîôûëïüÿäöüç');
-
-$spreadsheet->getActiveSheet()->setCellValue('A8', "Hello\nWorld");
-$spreadsheet->getActiveSheet()->getRowDimension(8)->setRowHeight(-1);
-$spreadsheet->getActiveSheet()->getStyle('A8')->getAlignment()->setWrapText(true);
-
-// Rename worksheet
-$helper->log('Rename worksheet');
-$spreadsheet->getActiveSheet()->setTitle('Simple');
-
-// Set active sheet index to the first sheet, so Excel opens this as the first sheet
-$spreadsheet->setActiveSheetIndex(0);
-
-// Save Excel 2007 file
-$helper->log('Write to Xlsx format');
-
-// Use PCLZip rather than ZipArchive to create the Xlsx OfficeOpenXML file
-\PhpOffice\PhpSpreadsheet\Settings::setZipClass(\PhpOffice\PhpSpreadsheet\Settings::PCLZIP);
-
-// Save
-$helper->write($spreadsheet, __FILE__, ['Xlsx']);

samples/07_Reader_PCLZip.php

@@ -1,20 +0,0 @@
-<?php
-
-require __DIR__ . '/Header.php';
-
-// Create temporary file that will be read
-$sampleSpreadsheet = require __DIR__ . '/templates/sampleSpreadsheet.php';
-$filename = $helper->getTemporaryFilename();
-$writer = new \PhpOffice\PhpSpreadsheet\Writer\Xlsx($sampleSpreadsheet);
-$writer->save($filename);
-
-// Use PCLZip rather than ZipArchive to read the Xlsx OfficeOpenXML file
-\PhpSpreadsheet\Settings::setZipClass(\PhpOffice\PhpSpreadsheet\Settings::PCLZIP);
-
-$callStartTime = microtime(true);
-$spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load($filename);
-$helper->logRead('Xlsx', $filename, $callStartTime);
-$callEndTime = microtime(true);
-
-// Save
-$helper->write($spreadsheet, __FILE__);

samples/20_Read_Ods_with_PCLZip.php

@@ -1,14 +0,0 @@
-<?php
-
-require __DIR__ . '/Header.php';
-
-// Use PCLZip rather than ZipArchive to read the Xlsx OfficeOpenXML file
-\PhpOffice\PhpSpreadsheet\Settings::setZipClass(\PhpOffice\PhpSpreadsheet\Settings::PCLZIP);
-
-$filename = __DIR__ . '/templates/OOCalcTest.ods';
-$callStartTime = microtime(true);
-$spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load($filename);
-$helper->logRead('Ods', $filename, $callStartTime);
-
-// Save
-$helper->write($spreadsheet, __FILE__);

samples/index.php

@@ -7,7 +7,7 @@ $requirements = [
     'PHP extension XML' => extension_loaded('xml'),
     'PHP extension xmlwriter' => extension_loaded('xmlwriter'),
     'PHP extension mbstring' => extension_loaded('mbstring'),
-    'PHP extension ZipArchive (optional)' => extension_loaded('zip'),
+    'PHP extension ZipArchive' => extension_loaded('zip'),
     'PHP extension GD (optional)' => extension_loaded('gd'),
     'PHP extension dom (optional)' => extension_loaded('dom'),
 ];