Fix empty shared string issue

• Fixed a bug that caused empty shared strings to be treated incorrectly under certain conditions.

Fixes regarding custom formats and PHP 7.3 support

• Fixed a bug that caused cell formats making use of currency strings and language ids to break.
• Fixed a "continue in switch" warning in PHP 7.3.

Alphabetical column indexes and fixes

• Added the option to use alphabetical column names (A, B, AA, ZX) instead of numeric indexes in returned row contents, using the parameter "OutputColumnNames".
• Fixed a bug that caused leading zeros in text cell content to get removed if the cell was set to text via an apostrophe prefix.

Fix empty row handling issue

This is a bugfix release fixing an issue that prevented empty rows from being properly output in all appropriate cases.

Fix format handling issues

This is a bugfix release fixing an issue that caused format parsing to cease working for some files.

Improved handling of DateTime values and temporary files

• New configuration parameters to control automatic re-formatting of found Date/Time values: forceDateFormat, forceTimeFormat, forceDateTimeFormat
• Improved handling of potential errors when working with subdirectories of the configured temporary directory
• Fixed composer.json lacking ext-xmlreader requirement

Improved XML Namespace support

• Improved support for different XLSX file generators:
  • Improved awareness of XML namespaces.
• Improved support for newer OOXML editions:
  • Namespace URIs from newer versions of the OOXML standard are now recognized and handled accordingly.
• Dropped requirement for SimpleXMLElement.
• Minor improvements in handling used document resources.

Bugfix Release v0.6.3

Bugfix: Check if current row, that is to be read, is also the one which the read() function takes, return empty row if not.

Bugfix Release v0.6.2

Bugfix

• differentiate between internal sheet ID and positioning ordering of the sheet within the document