129 lines
4.6 KiB
Markdown
129 lines
4.6 KiB
Markdown
# Worksheets
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A worksheet is a collection of cells, formulae, images, graphs, etc. It
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holds all data necessary to represent a spreadsheet worksheet.
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When you load a workbook from a spreadsheet file, it will be loaded with
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all its existing worksheets (unless you specified that only certain
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sheets should be loaded). When you load from non-spreadsheet files (such
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as a CSV or HTML file) or from spreadsheet formats that don't identify
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worksheets by name (such as SYLK), then a single worksheet called
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"WorkSheet1" will be created containing the data from that file.
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When you instantiate a new workbook, PhpSpreadsheet will create it with
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a single worksheet called "WorkSheet1".
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The `getSheetCount()` method will tell you the number of worksheets in
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the workbook; while the `getSheetNames()` method will return a list of
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all worksheets in the workbook, indexed by the order in which their
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"tabs" would appear when opened in MS Excel (or other appropriate
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Spreadsheet program).
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Individual worksheets can be accessed by name, or by their index
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position in the workbook. The index position represents the order that
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each worksheet "tab" is shown when the workbook is opened in MS Excel
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(or other appropriate Spreadsheet program). To access a sheet by its
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index, use the `getSheet()` method.
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``` php
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// Get the second sheet in the workbook
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// Note that sheets are indexed from 0
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$spreadsheet->getSheet(1);
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```
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Methods also exist allowing you to reorder the worksheets in the
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workbook.
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To access a sheet by name, use the `getSheetByName()` method, specifying
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the name of the worksheet that you want to access.
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``` php
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// Retrieve the worksheet called 'Worksheet 1'
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$spreadsheet->getSheetByName('Worksheet 1');
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```
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Alternatively, one worksheet is always the currently active worksheet,
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and you can access that directly. The currently active worksheet is the
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one that will be active when the workbook is opened in MS Excel (or
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other appropriate Spreadsheet program).
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``` php
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// Retrieve the current active worksheet
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$spreadsheet->getActiveSheet();
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```
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You can change the currently active sheet by index or by name using the
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`setActiveSheetIndex()` and `setActiveSheetIndexByName()` methods.
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## Adding a new Worksheet
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You can add a new worksheet to the workbook using the `createSheet()`
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method of the `Spreadsheet` object. By default, this will be created as
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a new "last" sheet; but you can also specify an index position as an
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argument, and the worksheet will be inserted at that position, shuffling
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all subsequent worksheets in the collection down a place.
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``` php
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$spreadsheet->createSheet();
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```
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A new worksheet created using this method will be called
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`Worksheet<n>` where `<n>` is the lowest number possible to
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guarantee that the title is unique.
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Alternatively, you can instantiate a new worksheet (setting the title to
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whatever you choose) and then insert it into your workbook using the
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`addSheet()` method.
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``` php
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// Create a new worksheet called "My Data"
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$myWorkSheet = new \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet($spreadsheet, 'My Data');
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// Attach the "My Data" worksheet as the first worksheet in the Spreadsheet object
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$spreadsheet->addSheet($myWorkSheet, 0);
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```
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If you don't specify an index position as the second argument, then the
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new worksheet will be added after the last existing worksheet.
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## Copying Worksheets
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Sheets within the same workbook can be copied by creating a clone of the
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worksheet you wish to copy, and then using the `addSheet()` method to
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insert the clone into the workbook.
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``` php
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$clonedWorksheet = clone $spreadsheet->getSheetByName('Worksheet 1');
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$clonedWorksheet->setTitle('Copy of Worksheet 1');
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$spreadsheet->addSheet($clonedWorksheet);
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```
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You can also copy worksheets from one workbook to another, though this
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is more complex as PhpSpreadsheet also has to replicate the styling
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between the two workbooks. The `addExternalSheet()` method is provided for
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this purpose.
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$clonedWorksheet = clone $spreadsheet1->getSheetByName('Worksheet 1');
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$spreadsheet->addExternalSheet($clonedWorksheet);
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In both cases, it is the developer's responsibility to ensure that
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worksheet names are not duplicated. PhpSpreadsheet will throw an
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exception if you attempt to copy worksheets that will result in a
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duplicate name.
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## Removing a Worksheet
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You can delete a worksheet from a workbook, identified by its index
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position, using the `removeSheetByIndex()` method
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``` php
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$sheetIndex = $spreadsheet->getIndex(
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$spreadsheet->getSheetByName('Worksheet 1')
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);
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$spreadsheet->removeSheetByIndex($sheetIndex);
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```
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If the currently active worksheet is deleted, then the sheet at the
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previous index position will become the currently active sheet.
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