I just recently started using this library (the one from CodePlex), but I ran into some issues. My goal is to use it so I can process some data from multiple Excel files, and send such data to a database, per file. I’m doing something like:
foreach( $file_list as $file ) {
$book = PHPExcel_IOFactory::load( $path . $file );
}
So, inside the foreach I’m (for now) just showing the data to the user, but after five files, I get a memory error:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 50688 bytes) in /var/www/test/classes/PHPExcel/Shared/OLERead.php on line 76
Is there a way to __destruct the object after each file is loaded, so space is reserved (made free) for the next file, instead of accumulating it, or do you rather know of a reason and work-around for this?
Please let me know any suggestions you have.
Thanks in advance.
The latest SVN code for PHPExcel (just checked in today) introduces cell caching to reduce memory usage… it’s such a new feature, I haven’t even had the time to document it yet.
While the default method is identical to the present method, with the worksheet <–> cell relationship containing a cyclic reference, I believe that using any of the memory-reducing cache mechanisms should eliminate this cyclic reference. If not, let me know and I should be able to break the reference when unsetting a workbook/worksheet using some of the caching logic that already disables this connection when serializing the cells for caching.