PhpSpreadsheet/Documentation/markdown/ReadingSpreadsheetFiles/07-Helper-Methods.md

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# PHPExcel User Documentation Reading Spreadsheet Files
## Helper Methods
You can retrieve a list of worksheet names contained in a file without loading the whole file by using the Readers `listWorksheetNames()` method; similarly, a `listWorksheetInfo()` method will retrieve the dimensions of worksheet in a file without needing to load and parse the whole file.
### listWorksheetNames
The `listWorksheetNames()` method returns a simple array listing each worksheet name within the workbook:
```php
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
$worksheetNames = $objReader->listWorksheetNames($inputFileName);
echo '<h3>Worksheet Names</h3>';
echo '<ol>';
foreach ($worksheetNames as $worksheetName) {
echo '<li>', $worksheetName, '</li>';
}
echo '</ol>';
```
> See Examples/Reader/exampleReader18.php for a working example of this code.
### listWorksheetInfo
The `listWorksheetInfo()` method returns a nested array, with each entry listing the name and dimensions for a worksheet:
```php
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
$worksheetData = $objReader->listWorksheetInfo($inputFileName);
echo '<h3>Worksheet Information</h3>';
echo '<ol>';
foreach ($worksheetData as $worksheet) {
echo '<li>', $worksheet['worksheetName'], '<br />';
echo 'Rows: ', $worksheet['totalRows'],
' Columns: ', $worksheet['totalColumns'], '<br />';
echo 'Cell Range: A1:',
$worksheet['lastColumnLetter'], $worksheet['totalRows'];
echo '</li>';
}
echo '</ol>';
```
> See Examples/Reader/exampleReader19.php for a working example of this code.