Frequently asked questions
There seems to be a problem with character encoding...
It is necessary to use UTF-8 encoding for all texts in PhpSpreadsheet.
If the script uses different encoding then you can convert those texts
Fatal error: Allowed memory size of xxx bytes exhausted (tried to allocate yyy bytes) in zzz on line aaa
PhpSpreadsheet holds an "in memory" representation of a spreadsheet, so
it is susceptible to PHP's memory limitations. The memory made available
to PHP can be increased by editing the value of the
directive in your
php.ini file, or by using
ini_set('memory_limit', '128M') within your code.
Some Readers and Writers are faster than others, and they also use differing amounts of memory.
Protection on my worksheet is not working?
When you make use of any of the worksheet protection features (e.g. cell range protection, prohibiting deleting rows, ...), make sure you enable worksheet security. This can for example be done like this:
Feature X is not working with Reader_Y / Writer_Z
Not all features of PhpSpreadsheet are implemented in all of the Reader / Writer classes. This is mostly due to underlying libraries not supporting a specific feature or not having implemented a specific feature.
For example autofilter is not implemented in PEAR Spreadsheet_Excel_writer, which is the base of our Xls writer.
We are slowly building up a list of features, together with the different readers and writers that support them, in the features cross reference.
Formulas don't seem to be calculated in Excel2003 using compatibility pack?
This is normal behaviour of the compatibility pack,
Xlsx displays this
\PhpOffice\PhpSpreadsheet\Writer\Xls if you really need
calculated values, or force recalculation in Excel2003.
Setting column width is not 100% accurate
Trying to set column width, I experience one problem. When I open the file in Excel, the actual width is 0.71 less than it should be.
The short answer is that PhpSpreadsheet uses a measure where padding is included. See how to set a column's width for more details.
I cannot serialize or json_encode my Spreadsheet
No, you can't. Consider the Spreadsheet object as a PHP resource, which cannot be serialized.