Although Excel has a Date type, older Excel versions use numeric values to store dates.
The value represents the number of days since Jan 1st, 1900.
The only way to tell if the value is a number or a date is to look at the styles.xml and check if the cell has date formatting.
Spout can now read ODS files.
It's on par with the XLSX reader. The only difference is that the row iterator cannot be rewound.
It supports the different output formats from LibreOffice and Excel, skipping extra rows/cells if needed.
Added ODS writer
Refactored XLSX writer to abstract some pieces into an abstract multi-sheets writer
Created an abstract style helper
Moved shared components around
Instead of the hasNext() / next() syntax, readers now implements the PHP iterator pattern.
It allows readers to be used with a foreach() loop.
All readers now share the same structure (CSV is treated as having exactly one sheet):
- one concrete Reader
- one SheetIterator, exposed by the Reader
- one or more Sheets, returned at every iteration
- one RowIterator, exposed by the Sheet
Introducing the concept of sheets for CSV may be kind of confusing but it makes Spout way more consistent.
Also, this confusion may be resolved by creating a wrapper around the readers if needed.
-- This commit does not delete the old files, not change the folder structure for Writers. This will be done in another commit.
Based on the number of unique shared strings as well as the available memory amount,
one strategy will be chosen over the other.
The algorithm is based on empirical data and super safe so it may need to be tuned.
In-memory implementation using SplFixedArray
Updated code and tests to support errors when reading XML nodes (useful when reading XML files used for attacks)
Removed LIBXML_NOENT option (which DOES substitute entities...)
Added test for Quadratic Blowup attack
A bug was introduced, preventing Spout to create valid XLSX files on Windows.
This commits reverts the changes that introduced DIRECTORY_SEPARATOR everywhere
and fixes the original issue with the writer by normalizing paths when creating
the zipped file.
Added LIBXML_NOENT option when reading a XML file
libxml_disable_entity_loader(true) cannot be used because it disables
the use of XMLReader::open()... see https://bugs.php.net/bug.php?id=62577
Added proper support for booleans, dates, numbers, errors.
Added unescaping of the read string.
Fixed a bug when cells did not have any values => now returns empty string.
Added Sheet class for the XLSX reader that exposes basic sheet info, such as name or ID.
When retrieving the sheet data XML, added extra XML parsing to retrieve sheet data.
Added test
Fixes#3:
The sheetN.xml files location is dynamically retrieved when parsing
[Content_Types].xml. In this file, the location is like "/xl/worksheets/sheet1.xml".
Because the zip stream wrapper expects the zip entry name to be like
"xl/worksheets/sheet1/xml" (without the first "/"), this first "/"
needs to be trimmed. It was trimmed using:
ltrim($this->dataXmlFilePath, DIRECTORY_SEPARATOR);
which obvisously does not work on Windows platform where DIRECTORY_SEPARATOR is "\".
Replacing DIRECTORY_SEPARATOR by '/' solves this issue.
Escaped line feed characters in shared strings before processing them.
This makes every string remain on one single line and therefore allow
fast retrieval
Replaced usages of "\n" by PHP_EOL
Added test for multiline strings
